The frequency of vibration f of a mass m suspended from a spring of spring constant k is given by relation of the type \[f=c{{m}^{x}}{{K}^{y}},\]where c is a dimensionless constant. The values of x and y are-
A)
1/2, 1/2
done
clear
B)
-1/2, -1/2
done
clear
C)
1/2, -1/2
done
clear
D)
-1/2, ½
done
clear
View Answer play_arrow
If \[\overset{\to }{\mathop{A}}\,\] is parallel to\[\overset{\to }{\mathop{B}}\,\], then -
A)
\[\overset{\to }{\mathop{A}}\,.(\overset{\to }{\mathop{A}}\,+\overset{\to }{\mathop{B}}\,)={{A}^{2}}+AB\]
done
clear
B)
\[\overset{\to }{\mathop{A}}\,\times (\overset{\to }{\mathop{A}}\,+\overset{\to }{\mathop{B}}\,)=AB\]_
done
clear
C)
\[\overset{\to }{\mathop{A}}\,.\overset{\to }{\mathop{B}}\,=0\]
done
clear
D)
\[\overset{\to }{\mathop{A}}\,\times (\overset{\to }{\mathop{A}}\,\times \overset{\to }{\mathop{B}}\,)=9\]
done
clear
View Answer play_arrow
A person standing on a truck moving with a uniform velocity \[14.7\text{ }m{{s}^{-1}}\]on a horizontal road throws a ball in such a way that it returns to him after 4s. Find the speed and angle of projection as seen by a man on the road -
A)
\[19.6\text{ }m{{s}^{-1}},\]vertical
done
clear
B)
\[24.5\text{ }m{{s}^{-1}},\]vertical
done
clear
C)
\[19.6\text{ }m{{s}^{-1}},53{}^\circ \]with the road
done
clear
D)
\[24.5\text{ }m{{s}^{-1}},53{}^\circ \]with the road
done
clear
View Answer play_arrow
An object fall from rest. In the last second of its fall, it covers half of the total distance. If \[g=9.8\text{ }m{{s}^{-2}},\]then the total time of its fall is -
A)
\[(2-\sqrt{2})s\]
done
clear
B)
\[(2+\sqrt{2})s\]
done
clear
C)
\[(2\pm \sqrt{2})s\]
done
clear
D)
4 s
done
clear
View Answer play_arrow
A ball is dropped into a well in which the water level is at a depth h below the top. Let the speed of sound be c; then the time after which the splash is heard will be given by -
A)
\[h\left[ \sqrt{\frac{2}{gh}}+\frac{1}{c} \right]\]
done
clear
B)
\[h\left[ \sqrt{\frac{2}{gh}}-\frac{1}{c} \right]\]
done
clear
C)
\[h\left[ \frac{2}{g}+\frac{1}{c} \right]\]
done
clear
D)
\[h\left[ \frac{2}{g}-\frac{1}{c} \right]\]
done
clear
View Answer play_arrow
A light string passing over a smooth light pulley connects two blocks of masses \[{{m}_{1}}\] and \[{{m}_{2}}\] (vertically). If the acceleration of the system is g/8 then the ratio of the masses is -
A)
\[8:1\]
done
clear
B)
\[9:7\]
done
clear
C)
\[4:3\]
done
clear
D)
\[5:3\]
done
clear
View Answer play_arrow
A body mass m rests on horizontal surface. The coefficient of friction between the body and the surface is\[\mu \]. If the mass is pulled by a force P as shown in the figure, the limiting friction between body and surface will be -
A)
\[\mu mg\]
done
clear
B)
\[\mu \left[ mg+\left( \frac{P}{2} \right) \right]\]
done
clear
C)
\[\mu \left[ mg-\left( \frac{P}{2} \right) \right]\]
done
clear
D)
\[\mu \left[ mg-\left( \frac{\sqrt{3}P}{2} \right) \right]\]
done
clear
View Answer play_arrow
Two blocks A and B are placed, one on the top of the other, on a smooth horizontal surface, as shown, The maximum horizontal force that can be applied to B, so that both A and B move together is 49 N. The coefficient of friction between A and B is -
A)
\[0.2\]
done
clear
B)
\[0.3\]
done
clear
C)
\[0.5\]
done
clear
D)
\[0.8\]
done
clear
View Answer play_arrow
A particle moves in a straight line with its retardation proportional to its displacement 'x'. Change in kinetic energy Is proportional to-
A)
\[{{x}^{2}}\]
done
clear
B)
\[{{e}^{x}}\]
done
clear
C)
\[x\]
done
clear
D)
\[lo{{g}_{e}}x\]
done
clear
View Answer play_arrow
A particle is moving in a circular path of constant radius r such that its centripetal acceleration is varying with time t, and is proportional to\[r{{t}^{2}}\]. The power delivered to the particle by the force acting on it will be proportional to-
A)
\[r{{t}^{2}}\]
done
clear
B)
\[rt\]
done
clear
C)
\[{{r}^{2}}t\]
done
clear
D)
\[r/t\]
done
clear
View Answer play_arrow
Three identical rods each of mass M, length \[\ell \] are joined to form an equilateral \[\Delta ABC.\]Find the MOI about BC as shown -
A)
\[\frac{2}{3}M\ell \]
done
clear
B)
\[\frac{M\ell }{4}\]
done
clear
C)
\[\frac{M{{\ell }^{2}}}{2}\]
done
clear
D)
None of these
done
clear
View Answer play_arrow
A metre stick swinging in vertical plane about a fixed horizontal axis passing through its one end undergoes small oscillation of frequency \[{{f}_{0}}.\]If the bottom half of the stick were cut off, then its new frequency of small oscillation would become-
A)
\[{{f}_{0}}\]
done
clear
B)
\[\sqrt{2}{{f}_{0}}\]
done
clear
C)
\[2{{f}_{0}}\]
done
clear
D)
\[2\sqrt{2}{{f}_{0}}\]
done
clear
View Answer play_arrow
A satellite revolving around a planet has a time period T and orbital radius R, the mass of this planet is -
A)
\[\frac{4{{\pi }^{2}}{{R}^{3}}}{G}\]
done
clear
B)
\[\frac{4{{\pi }^{2}}{{R}^{3}}T}{G}\]
done
clear
C)
\[\frac{{{R}^{3}}T}{G}\]
done
clear
D)
\[\frac{4{{\pi }^{2}}{{R}^{3}}}{G{{T}^{2}}}\]
done
clear
View Answer play_arrow
A film projector magnifies a \[100\text{ }c{{m}^{2}}\]film strip on a screen. If the linear magnification is 4, the area of magnified film on screen is -
A)
\[1600c{{m}^{2}}\]
done
clear
B)
\[400c{{m}^{2}}\]
done
clear
C)
\[800c{{m}^{2}}\]
done
clear
D)
\[200c{{m}^{2}}\]
done
clear
View Answer play_arrow
When a plastic thin film of refractive index 1.45 is placed in the path of one of the interfering waves then the central fringe is displaced through width of five fringes. The thickness of the film, if the wavelength of light is \[05890\overset{\text{o}}{\mathop{\text{A}}}\,\] , will be -
A)
\[6.544\times {{10}^{-4}}cm\]
done
clear
B)
\[6.544\times {{10}^{-4}}m\]
done
clear
C)
\[6.54\times {{10}^{-4}}cm\]
done
clear
D)
\[6.5\times {{10}^{-4}}cm\]
done
clear
View Answer play_arrow
If for a given prism the angle of incidence is changed from \[0{}^\circ \] to \[90{}^\circ \]. The angle of deviation-
A)
Increases
done
clear
B)
Decreases
done
clear
C)
First decreases and then increases
done
clear
D)
First increases and then decreases
done
clear
View Answer play_arrow
In the figure given below there are two convex lens \[{{L}_{1}}\] and \[{{L}_{2}}\] having focal lengths \[{{F}_{1}}\]and \[{{F}_{2}}\] respectively. The distance between \[{{L}_{1}}\] and \[{{L}_{2}}\] will be -
A)
\[{{F}_{1}}\]
done
clear
B)
\[{{F}_{2}}\]
done
clear
C)
\[{{F}_{1}}+{{F}_{2}}\]
done
clear
D)
\[{{F}_{1}}-{{F}_{2}}\]
done
clear
View Answer play_arrow
When an object is at distance x and y from a lens, a real image and a virtual image is formed respectively having same magnification. The focal length of the lens is -
A)
\[\frac{x+y}{2}\]
done
clear
B)
\[x-y\]
done
clear
C)
\[\sqrt{xy}\]
done
clear
D)
\[x+y\]
done
clear
View Answer play_arrow
A charged particle +Q is placed at point of suspension of a simple pendulum. Another charge -Q is place on bob of pendulum. What will be effect on frequency of oscillation -
A)
Increases
done
clear
B)
Decreases
done
clear
C)
Remains unchanged
done
clear
D)
None of these
done
clear
View Answer play_arrow
Two particle of mass m are placed at surface and centre of a shell of radius 2r and same mass m. Find the gravitation potential at a distance r from centre inside the sphere -
A)
\[-\frac{Gm}{r}\]
done
clear
B)
\[-\frac{5}{2}\frac{Gm}{r}\]
done
clear
C)
\[-\frac{3}{2}\frac{Gm}{r}\]
done
clear
D)
None of these
done
clear
View Answer play_arrow
Two spherical soap bubbles of radii \[{{r}_{1}}\] and \[{{r}_{2}}\] in vacuum combine under isothermal conditions. The resulting bubble has a radius equal to -
A)
\[\frac{{{r}_{1}}+{{r}_{2}}}{2}\]
done
clear
B)
\[\sqrt{{{r}_{1}}{{r}_{2}}}\]
done
clear
C)
\[\frac{{{r}_{1}}{{r}_{2}}}{{{r}_{1}}+{{r}_{2}}}\]
done
clear
D)
\[r_{1}^{2}+r_{2}^{2}\]
done
clear
View Answer play_arrow
The pressure on a swimmer \[20m\]below the surface of water at sea level is-
A)
\[1.0\text{ }atm\]
done
clear
B)
\[2.0\text{ }atm\]
done
clear
C)
\[2.5\text{ }atm\]
done
clear
D)
\[3.0\text{ }atm\]
done
clear
View Answer play_arrow
A point charge is surrounded by eight identical charges at a distance r as shown in figure. How much work is done by the force of electrostatic repulsion when the point charge at the centre is removed to infinity -
A)
zero
done
clear
B)
\[\frac{8{{q}^{2}}}{4\pi {{\varepsilon }_{0}}r}\]
done
clear
C)
\[\frac{8q}{4\pi {{\varepsilon }_{0}}r}\]
done
clear
D)
\[\frac{64{{q}^{2}}}{4\pi {{\varepsilon }_{0}}r}\]
done
clear
View Answer play_arrow
Three identical spheres, each having a charge q and radius R, are kept in such a way that each touches the other two. The magnitude of the electric force on any sphere due to the other two
A)
\[\frac{1}{4\pi {{\varepsilon }_{0}}}{{\left( \frac{q}{R} \right)}^{2}}\]
done
clear
B)
\[\frac{\sqrt{3}}{4\pi {{\varepsilon }_{0}}}{{\left( \frac{q}{R} \right)}^{2}}\]
done
clear
C)
\[\frac{\sqrt{3}}{16\pi {{\varepsilon }_{0}}}{{\left( \frac{q}{R} \right)}^{2}}\]
done
clear
D)
\[\frac{\sqrt{5}}{16\pi {{\varepsilon }_{0}}}{{\left( \frac{q}{R} \right)}^{2}}\]
done
clear
View Answer play_arrow
The ratio of potential difference between \[1\mu F\] and \[5\mu F\]capacitors -
A)
\[1:2\]
done
clear
B)
\[3:1\]
done
clear
C)
\[1:5\]
done
clear
D)
\[10:1\]
done
clear
View Answer play_arrow
Net capacitance between the point P and Q when A is the area of the plates and d is the distance between the plates -
A)
\[\frac{3A{{\varepsilon }_{0}}}{2d}\]
done
clear
B)
\[\frac{2A{{\varepsilon }_{0}}}{3d}\]
done
clear
C)
\[\frac{5A{{\varepsilon }_{0}}}{3d}\]
done
clear
D)
\[\frac{3A{{\varepsilon }_{0}}}{5d}\]
done
clear
View Answer play_arrow
Three batteries of emf IV and internal resistance \[1\Omega \] each are connected as shown. Effective emf of combination between the points PQ is -
A)
Zero
done
clear
B)
1V
done
clear
C)
2V
done
clear
D)
2/3V
done
clear
View Answer play_arrow
Eight resistances each of resistance \[5\Omega \] are connected in the circuit as shown in figure. The equivalent resistance between A and B is -
A)
\[\frac{8}{3}\Omega \]
done
clear
B)
\[\frac{16}{3}\Omega \]
done
clear
C)
\[\frac{15}{7}\Omega \]
done
clear
D)
\[\frac{19}{2}\Omega \]
done
clear
View Answer play_arrow
Which one of the following graphs represents the behaviour of magnetic susuptibility \[(\chi )\] of the paramagnetic substance with the temperature T?
A)
done
clear
B)
done
clear
C)
done
clear
D)
done
clear
View Answer play_arrow
A proton and an alpha particle having same momentum enter a magnetic field at right angles to it. If \[{{r}_{1}}\] and \[{{r}_{2}}\] be their radii respectively then value of \[{{r}_{1}}/{{r}_{2}}\] is -
A)
1
done
clear
B)
2
done
clear
C)
1/2
done
clear
D)
¼
done
clear
View Answer play_arrow
A current\[1=10sin(1007\pi \text{ }t)\,\,amp.\]is passed in first coil, which induces a maximum e.m.f of \[5\pi \]volt in second coil. The mutual inductance between the coils is -
A)
\[10mH\]
done
clear
B)
\[15\text{ }mH\]
done
clear
C)
\[25\text{ }mH\]
done
clear
D)
\[5\text{ }mH\]
done
clear
View Answer play_arrow
The following figure shows a conducting disc rotating about its axis in a perpendicular magnetic field B. The resistor of resistance R is connected between the centre and the rim. The current in the resistor is - (The radius of the disc is 5.0 cm, angular speed\[\omega =100\]radian/sec., (\[B=0.40\,T\]and\[R=10\Omega .\])
A)
0.5A
done
clear
B)
0.2A
done
clear
C)
0.3A
done
clear
D)
0.9A
done
clear
View Answer play_arrow
The e. m. f E = 4 cos 1000t volts is applied to an \[L-R\] circuit containing inductance 3 mH and resistance\[4\Omega \]. The amplitude of current is -
A)
\[4\sqrt{7}\,\,A\]
done
clear
B)
1.0 A
done
clear
C)
\[\frac{4}{7}\] A
done
clear
D)
0.8 A
done
clear
View Answer play_arrow
A voltage of peak value 283 V and varying frequency is applied to a series L-C-R combination in which R = \[3\Omega \], L = 25 mH and\[C=40\mu F\]. Then, the frequency (in Hz) of the source at which maximum power is dissipated in the above, is -
A)
\[\frac{250}{\pi }\]
done
clear
B)
\[\frac{200}{\pi }\]
done
clear
C)
\[\frac{100}{\pi }\]
done
clear
D)
\[\frac{500}{\pi }\]
done
clear
View Answer play_arrow
The mean lives of a radioactive substance are 1620 year and 405 year for \[\alpha \]-emission and \[\beta \]-emission respectively. Find the time during which three-fourth of a sample will decay if it is decaying both by \[\alpha \]-emission and \[\beta \]-emission simultaneously-
A)
249 years
done
clear
B)
449 years
done
clear
C)
133 years
done
clear
D)
99 years
done
clear
View Answer play_arrow
For a certain radioactive substance, it is observed that after 4 hours, only 6.25% of the original sample is left undecayed. If follows that:
[a] the half-life of the sample is 1 hour [b] the mean life of the sample is \[\frac{1}{In\,\,2}\] hour [c] the decay constant of the sample is In 2 hour\[^{-1}\] [d] after a further 4 hours, the amount of the substance left over would by only 0.39% of the original amount
A)
a, b
done
clear
B)
b, c
done
clear
C)
a, b, c
done
clear
D)
a, b, c, d
done
clear
View Answer play_arrow
For nuclei having A > 120 :
[a] The binding energy of nucleus decreases as A increases [b] The binding energy per nucleon decreases as A increases [c] If the nucleus breaks into two roughly equal parts, energy is released [d] If two nuclei fuse to form a bigger nucleus energy is released
A)
a, b
done
clear
B)
b, c
done
clear
C)
a, b, c
done
clear
D)
a, b, c, d
done
clear
View Answer play_arrow
If the wavelength of light in an experiment on photoelectric effect is doubled -
[a] the photoelectric emission will not take place [b] the photoelectric emission may or may not take place [c] the stopping potential will increase [d] the stopping potential will decrease
A)
a, c
done
clear
B)
b, c
done
clear
C)
a, d
done
clear
D)
b, d
done
clear
View Answer play_arrow
An electron in hydrogen like atom makes a transition from nth orbit and emits radiation corresponding to lyman series. If de-Broglie wavelength of electron in nth orbit is equal to the wavelength of radiation emitted, find the value of n. The atomic number of atoms is 11.
A)
22
done
clear
B)
23
done
clear
C)
24
done
clear
D)
25
done
clear
View Answer play_arrow
In a common-emitter amplifier, output resistance is \[5000\,\Omega \] and input resistance is \[2000\,\Omega \]. If peak value of signal voltage is 10 mV and\[\beta =50\], then the peak value of output voltage is -
A)
\[5\times {{10}^{-6}}\]volt
done
clear
B)
\[2.5\times {{10}^{-4}}\]volt
done
clear
C)
1.25 volt
done
clear
D)
125 volt
done
clear
View Answer play_arrow
The output r. m. s. value of half wave rectifier is, when input current is \[I=400\sqrt{2}\] sin \[100\pi t:\]
A)
\[200\sqrt{2}\]
done
clear
B)
400
done
clear
C)
\[100\sqrt{2}\]
done
clear
D)
None of these
done
clear
View Answer play_arrow
The density of substance at \[100{}^\circ C\]is 7.25 g/cc and at \[0{}^\circ C\] is 7.5 g/cc, coefficient of linear expansion is -
A)
\[111\times {{10}^{-6}}/{}^\circ C\]
done
clear
B)
\[111\times {{10}^{-5}}/{}^\circ C\]
done
clear
C)
\[111\times {{10}^{-4}}/{}^\circ C\]
done
clear
D)
\[111\times {{10}^{-3}}/{}^\circ C\]
done
clear
View Answer play_arrow
The inside and outside temperatures of a refrigerator are 273 K and 303 K respectively. Assuming that refrigerator cycle is reversible, for every joule of work done, the heat delivered to the surrounding will be -
A)
10 J
done
clear
B)
20 J
done
clear
C)
30 J
done
clear
D)
50 J
done
clear
View Answer play_arrow
The speed of wave of time period T and propagation constant k is -
A)
\[\frac{2\pi }{Tk}\]
done
clear
B)
\[\frac{Tk}{2\pi }\]
done
clear
C)
\[\frac{1}{Tk}\]
done
clear
D)
\[\frac{T}{k}\]
done
clear
View Answer play_arrow
Along a stretched string equation of transverse wave is y = 3 sin \[\left[ 2\pi \left( \frac{x}{20}-\frac{t}{0.01} \right) \right]\]where, x, y are in cm and t is in sec. The wave velocity is -
A)
20m/s
done
clear
B)
30m/s
done
clear
C)
15m/s
done
clear
D)
25m/s
done
clear
View Answer play_arrow
Ethylbenzene with bromine in presence of \[FeB{{r}_{3}},\]predominantly gives:
A)
done
clear
B)
done
clear
C)
done
clear
D)
done
clear
View Answer play_arrow
The intermediate during the addition of HC1 to propene in presence of peroxide is :
A)
\[C{{H}_{3}}\overset{\bullet }{\mathop{C}}\,HC{{H}_{2}}C1\]
done
clear
B)
\[C{{H}_{3}}\overset{+}{\mathop{C}}\,HC{{H}_{3}}\]
done
clear
C)
\[C{{H}_{3}}C{{H}_{2}}\overset{\bullet }{\mathop{C}}\,{{H}_{2}}\]
done
clear
D)
\[C{{H}_{3}}C{{H}_{2}}\overset{+}{\mathop{C}}\,{{H}_{2}}\]
done
clear
View Answer play_arrow
\[{{C}_{7}}{{H}_{8}}\xrightarrow[\Delta ]{3C{{1}_{2}}}A\xrightarrow{B{{r}_{2}}/Fe}B\xrightarrow{Zn/HC1}C\] The compound C is:
A)
o-bromotoluene
done
clear
B)
m-bromotoluene
done
clear
C)
p-bromotoluene
done
clear
D)
3-bromo-2, 4, 6-trichlorotoluene
done
clear
View Answer play_arrow
The conversion of m-nitro phenol to resorcinol involves respectively:
A)
Hydrolysis, diazotization and reduction
done
clear
B)
Diazotization, reduction and hydrolysis
done
clear
C)
Hydrolysis, reduction and diazotization
done
clear
D)
Reduction, diazotisation and hydrolysis
done
clear
View Answer play_arrow
Consider the following compounds :
Which one of the following represents correctly the decreasing order of basicity of the above compounds?
A)
\[II>I>IV>III\]
done
clear
B)
\[III>IV>I>II\]
done
clear
C)
\[II>IV>I>III\]
done
clear
D)
\[III>I>IV>II~\]
done
clear
View Answer play_arrow
The ?A? is:
A)
2-acetoxy benzoic acid
done
clear
B)
Methyl salicylate
done
clear
C)
Methyl benzoate
done
clear
D)
2-methoxy benzoic acid
done
clear
View Answer play_arrow
In the following groups :
\[-OAc\left( I \right),\] \[-OMe\left( II \right),\] \[-OS{{O}_{2}}Me\text{ }\left( III \right),\] \[-OS{{O}_{2}}C{{F}_{3}}\left( IV \right)\] the order of leaving group ability is-
A)
\[I>II>III>IV\]
done
clear
B)
\[IV>III>I>II\]
done
clear
C)
\[\text{III}>II>I>IV~\]
done
clear
D)
\[\text{II}>III>IV>I\]
done
clear
View Answer play_arrow
The incorrect IUPAC name is -
A)
done
clear
B)
done
clear
C)
done
clear
D)
done
clear
View Answer play_arrow
The final product in the given reaction
A)
done
clear
B)
done
clear
C)
done
clear
D)
done
clear
View Answer play_arrow
The final product formed in the reaction is
A)
done
clear
B)
done
clear
C)
done
clear
D)
done
clear
View Answer play_arrow
Match List I with List II and select the correct answer using the codes given below the lists :
List-I List-II (I) lodoform [A] Anaesthetic (II) Methyl salicylate [B] Disinfectant (III) Diethyl ether [C] Insecticide (IV) Hexachlorocy clohexane [D] Detergent [E] Pain balm
Codes:
A)
\[I\to B;\text{ }II\to E;\text{ }III\to C;\text{ }IV\to D\]
done
clear
B)
\[I\to D;\text{ }II\to B;\text{ III }\to A;\text{ }IV\to C\]
done
clear
C)
\[I\to B;\text{ }II\to E;\text{ }III\to A;\text{ }IV\to C\]
done
clear
D)
\[I\to C;\text{ }II\to A;\text{ }III\to D;\text{ }IV\to B\]
done
clear
View Answer play_arrow
Which of the following evolves carbon dioxide, on oxidation with per-iodic acid \[(HI{{O}_{4}})\] ?
A)
done
clear
B)
done
clear
C)
Both the above
done
clear
D)
NOTA
done
clear
View Answer play_arrow
Ethylamine and aniline can be distinguished by:
A)
Hinsberg's test
done
clear
B)
Dye test
done
clear
C)
Liebermann's nitrosamine test
done
clear
D)
Carbylamine test
done
clear
View Answer play_arrow
Addition of \[{{K}_{4}}\left[ Fe{{\left( CN \right)}_{6}} \right]\]solution to \[FeC{{1}_{3}}\]solution gives -
A)
Ferro - ferricyanide
done
clear
B)
Ferri - ferrocyanide
done
clear
C)
Ferri - ferricyanide
done
clear
D)
None of these
done
clear
View Answer play_arrow
Which of the following involve radical intermediate?
A)
done
clear
B)
done
clear
C)
\[C{{H}_{3}}-CH=C{{H}_{2}}\xrightarrow{NBS}C{{H}_{2}}=CH-C{{H}_{2}}-Br\]
done
clear
D)
\[C{{H}_{3}}CHO+N{{H}_{2}}OH\xrightarrow{{{H}^{+}}}C{{H}_{3}}-CH=N-OH\]
done
clear
View Answer play_arrow
In the consideration of the Bohr theory for the hydrogenic species, which electron orbit of the \[B{{e}^{3+}}\] ion can have the same radius as the ground state electron orbit of the hydrogen atom?
A)
1
done
clear
B)
2
done
clear
C)
3
done
clear
D)
4
done
clear
View Answer play_arrow
Match the column-
[A] Coloured ion (P) \[C{{O}^{+}}\] [B]\[\mu =1.73\,B.M\] (Q) \[C{{O}^{2+}}\] [C] \[{{d}^{10}}=~\]Configuration (R) \[F{{e}^{2+}}\] [D] More than 3 unpaired electrons (S) \[M{{n}^{2+}}\]
A)
\[A\to R,P,Q;\text{ }B\to R,S;\text{ }C\to R;\text{ }D\to Q,S\]
done
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B)
\[A\to S,P;\text{ }B\to P;\,C\to R;D\to Q,S\]
done
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C)
\[A\to Q,R,S;\text{ }B\to Q;C\to P;\text{ }D\to R,S\]
done
clear
D)
\[A\to P,Q,S;\text{ }B\to Q;C\to P;\text{ }D\to R,S\]
done
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View Answer play_arrow
The compounds formed upon combustion of sodium metal in excess of air is -
A)
\[N{{a}_{2}}{{O}_{2}}\]
done
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B)
Na (Solid)
done
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C)
\[Na{{O}_{2}}\]
done
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D)
NaOH
done
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View Answer play_arrow
\[A{{1}_{4}}{{C}_{3}}\] is an ionic carbide, named as :
A)
Acetylide
done
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B)
Methanide
done
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C)
Allylide
done
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D)
Propenide
done
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View Answer play_arrow
Among the following compounds, the one that gets hydrolysed to form metallic hydroxide, hydrogen peroxide and oxygen is :
A)
\[N{{a}_{2}}O\]
done
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B)
\[N{{a}_{2}}{{O}_{2}}\]
done
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C)
\[L{{i}_{2}}{{O}_{2}}\]
done
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D)
\[K{{O}_{2}}\]
done
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View Answer play_arrow
Which of the following on heating produces\[N{{O}_{2}}\]?
A)
\[NaN{{O}_{3}}\]
done
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B)
\[AgN{{O}_{3}}\]
done
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C)
\[N{{H}_{4}}N{{O}_{3}}\]
done
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D)
\[N{{H}_{4}}N{{O}_{2}}\]
done
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View Answer play_arrow
Which of the following halides is not oxidizedby\[Mn{{O}_{2}}\]?
A)
\[{{F}^{-}}\]
done
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B)
\[C{{1}^{-}}\]
done
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C)
\[B{{r}^{-}}\]
done
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D)
\[{{I}^{-}}\]
done
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View Answer play_arrow
A vessel, fitted with a weightless, firiction less piston of 0.025 \[{{m}^{2}}\] area, contains excess cone. HCl. The piston moved 1 m outward when 0.075kg of iron fillings were added at 300 K. The solution left behind was found to contain Fe (II).The approximate purity of the iron sample is -
A)
50%
done
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B)
75%
done
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C)
90%
done
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D)
40%
done
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View Answer play_arrow
Hydrazine reacts with \[KI{{O}_{3}}\] in presence of HC1 as, \[{{N}_{2}}{{H}_{4}}+I{{O}_{3}}^{-}+2{{H}^{+}}+C{{1}^{-}}\xrightarrow{{}}\text{ }IC1+{{N}_{2}}+3{{H}_{2}}O\] The equivalent mass of \[{{N}_{2}}{{H}_{4}}\] and \[KI{{O}_{3}}\]respectively are -
A)
8, 87
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B)
8, 35.6
done
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C)
16, 53.5
done
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D)
8, 53.5
done
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View Answer play_arrow
Which of the following sets of quantum numbers belongs to the electron having highest energy?
A)
\[n=4,I=0,m=0,s=+\frac{1}{2}\]
done
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B)
\[n=3,l=0,m=0,s=+\frac{1}{2}\]
done
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C)
\[n=3,I=1,m=1,s=+\frac{1}{2}\]
done
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D)
\[n=3,I=2,m=1,s=+\frac{1}{2}\]
done
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View Answer play_arrow
The maximum value of I for an electron in fifth energy level is -
A)
5
done
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B)
4
done
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C)
3
done
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D)
2
done
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View Answer play_arrow
The value of the reaction quotient before any reaction occurs is -
A)
\[\infty \]
done
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B)
\[-1\]
done
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C)
0
done
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D)
1
done
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View Answer play_arrow
An inert gas is added to the following equilibrium,\[A(s)+2B(g)3C(g)\]at constant pressure. The equilibrium -
A)
Is not affected
done
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B)
Shifts to right
done
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C)
Shifts to left
done
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D)
May shift right and left both
done
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View Answer play_arrow
The vapour pressure of mercury is \[1871.88\times {{10}^{-6}}\] mm Hg at \[27{}^\circ C\] \[Hg(I)Hg(g)\]The value of equilibrium constant Kc is -
A)
\[{{10}^{-7}}\,M\]
done
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B)
\[1871.88\times {{10}^{-6}}\,M\]
done
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C)
\[{{10}^{-5}}M\]
done
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D)
\[3.9\times {{10}^{-5}}\,M\]
done
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View Answer play_arrow
1 mole of A is allowed to deco mpose in a 1 litre container. 0.4 mole of B was produced at equilibrium. The equilibrium constant \[{{K}_{e}}\] for the equilibrium \[A(g)2B(g)+C(g),\]is -
A)
0.04
done
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B)
0.053
done
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C)
0.08
done
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D)
0.106
done
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View Answer play_arrow
Increasing order of stability of the +2 oxidation state of the ions?
A)
\[C{{a}^{+2}}\,<B{{a}^{+2}}<S{{r}^{+2}}\]
done
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B)
\[P{{b}^{2+}}<G{{e}^{2+}}<S{{n}^{2+}}\]
done
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C)
\[G{{e}^{2+}}<S{{n}^{2+}}<P{{b}^{2+}}\]
done
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D)
\[C{{u}^{2+}}<A{{u}^{2+}}<A{{g}^{2+}}\]
done
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View Answer play_arrow
Which is not true statement about \[KMn{{O}_{4}}\]?
A)
Its solution is unstable in acidic medium
done
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B)
Its small quantity added to cone. \[{{H}_{2}}S{{O}_{4}}\],a green coloured solution containing \[Mn{{O}_{3}}^{+}\] ion is formed
done
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C)
\[Mn{{O}_{4}}^{-}\]changes to \[M{{n}^{2+}}\] in basic solution
done
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D)
It is self-indicator in \[F{{e}^{2+}}\] or \[{{C}_{2}}{{O}_{4}}^{2-}\]titration
done
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View Answer play_arrow
Give the correct order of initials T or F for following statement use T if statement is true and T if it is false.
(i) In gold schimdt thermite process Al act a a reducing agent
(ii) Mg is extracted by electrolysis of aq. Solution of \[MgC{{l}_{2}}\]
(iii) Extraction of Pb is possible by carbon- reduction method
(iv) Red Bauxite is purified by serpeck method
A)
TTTF
done
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B)
TFFT
done
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C)
FTTT
done
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D)
TFTT
done
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View Answer play_arrow
The linear structure is not assumed by-
A)
\[SnC{{l}_{2}}\]
done
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B)
\[NO_{2}^{+}\]
done
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C)
\[HgC{{l}_{2}}\]
done
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D)
\[C{{S}_{2}}\]
done
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View Answer play_arrow
The rate of a reaction gets doubled when the temperature changes from \[7{}^\circ C\]to\[17{}^\circ C\]. By what factor will it change for the temperature change from \[17{}^\circ C\]to\[27{}^\circ C\]:
A)
1.81
done
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B)
1.71
done
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C)
1.91
done
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D)
1.76
done
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View Answer play_arrow
The rate constant of a second order reaction is \[{{10}^{-2}}\] \[mo{{l}^{-1}}\] litre \[{{\sec }^{-1}}\]. The rate constant when expressed in \[c{{m}^{3}}\]\[molecul{{e}^{-1}}\] \[{{\min }^{-1}}\] is :
A)
\[9.96\times {{10}^{-22}}~~\]
done
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B)
\[9.96\times {{10}^{-23~}}~\]
done
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C)
\[9.96\times {{10}^{-21~}}\]
done
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D)
\[1.004\times {{10}^{-24}}\]
done
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View Answer play_arrow
The decomposition of \[{{N}_{2}}{{O}_{4}}\]to \[N{{O}_{2}}\] is carried out at 280 K in chloroform. When equilibrium has been established, 0.2 mol of \[{{N}_{2}}{{O}_{4}}\] and \[2\times {{10}^{-3}}\] mol of \[N{{O}_{2}}\] are present in 2 litre solution. The equilibrium constant for reaction \[{{N}_{2}}{{O}_{4}}2N{{O}_{2}}\] is:
A)
\[1\times {{10}^{-2}}\]
done
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B)
\[2\times {{10}^{-3}}\]
done
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C)
\[1\times {{10}^{-5}}~\]
done
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D)
\[2\times {{10}^{-5}}\]
done
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View Answer play_arrow
How much coulomb charge is present on 1 g ion of \[{{N}^{3-}}\]
A)
\[5.2\text{ }\times {{10}^{6}}\]Coulomb
done
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B)
\[2.894\times {{10}^{5}}\]Coulomb
done
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C)
\[6.6\times {{10}^{6}}\]Coulomb
done
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D)
\[8.2\times {{10}^{6}}\]Coulomb
done
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View Answer play_arrow
A gaseous mixture contains \[C{{H}_{4}}\]and \[{{C}_{2}}{{H}_{6}}\]in equimolar proportion. The weight of 2.24 litres of this mixture at NTP is -
A)
4.6g
done
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B)
1.6g
done
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C)
2.3g
done
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D)
23g
done
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View Answer play_arrow
For the reaction: \[2N{{H}_{3}}\to {{N}_{2}}+3{{H}_{2}}\]we have: \[-\frac{d[N{{H}_{3}}]}{dt}={{k}_{1}}[N{{H}_{3}}],\frac{d[{{N}_{2}}]}{dt}={{k}_{2}}[N{{H}_{3}}]\]and \[\frac{d[{{H}_{2}}]}{dt}={{k}_{3}}[N{{H}_{3}}]{{k}_{1}},{{k}_{2}}\]and \[{{k}_{3}}\] are related as:
A)
\[{{k}_{1}}={{k}_{2}}={{k}_{3}}\]
done
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B)
\[3{{k}_{1}}=6{{k}_{2}}=2{{k}_{3}}\]
done
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C)
\[2{{k}_{1}}=3{{k}_{2}}=6{{k}_{3}}~~\]
done
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D)
\[6{{k}_{1}}=3{{k}_{2}}=2{{k}_{3}}\]
done
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View Answer play_arrow
The mechanism of the reaction: \[A+2B+C\to D\]is
Step 1 \[A+BX\](Fast equilibrium) Step 2 \[X+C\to \]Y(slow) Step 3 \[Y+B\to \] D(fast) Which rate law is correct
A)
\[r=k\left[ C \right]\]
done
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B)
\[r=k\left[ A \right]{{\left[ B \right]}^{2}}\left[ C \right]\]
done
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C)
\[r=k\left[ A \right]\left[ B \right]\left[ C \right]\]
done
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D)
\[r=k\left[ D \right]\]
done
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View Answer play_arrow
The rate law for a reaction between the substances A and B is given by, rate\[=k{{[A]}^{n}}{{[B]}^{m}}\]. On doubling the concentration of A and halving the concentration of B, the ratio of the new rate to the earlier rate of the reaction will be as -
A)
\[\frac{1}{{{2}^{(m+n)}}}\]
done
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B)
\[(m+n)\]
done
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C)
\[\left( n-m \right)\]
done
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D)
\[{{2}^{(n-m)}}\]
done
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View Answer play_arrow
During electrolysis of fused calcium hydride, the hydrogen will be produced at:
A)
Cathod
done
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B)
Anode
done
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C)
\[{{H}_{2}}\] will not be liberated
done
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D)
\[{{H}_{2}}\] produced reacts with oxygen to form water
done
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View Answer play_arrow
On passing one faraday of electricity through the electrolytic cells containing \[A{{g}^{+}},N{{i}^{2+}}\] and \[C{{r}^{+3}}\] ions solution, the deposited Ag(At. wt. = 108), Ni (At. wt. = 59) and Cr (At. wt. = 52) is
A)
Ag 108gm Ni 29.5 gm Cr 17.3 gm
done
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B)
Ag 108 gm Ni 59.0 gm Cr 52.0 gm
done
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C)
Ag 108.0 gm Ni 108.0 gm Cr 108.0 gm
done
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D)
Ag 108 gm Ni 117.5 gm Cr 166.0 gm
done
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View Answer play_arrow
\[Ca{{C}_{2}}+{{H}_{2}}\text{O }\xrightarrow{{}}\text{ }Ca{{\left( OH \right)}_{2}}+{{C}_{2}}{{H}_{2}}\] In the above reaction, the hybrid state of carbon atoms
A)
change from \[s{{p}^{3}}\to s{{p}^{2}}\]
done
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B)
change from \[sp\to s{{p}^{2}}\]
done
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C)
change from \[s{{p}^{2}}\to \text{ }sp\]
done
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D)
remain unchanged.
done
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View Answer play_arrow
Lateral line sensory system is markedly developed in -
A)
Scoliodon
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B)
Cyclostomes, fish and a few larval amphibians
done
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C)
Larval stages of fishes
done
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D)
All members of class elasmobranchii
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View Answer play_arrow
Fibroblasts, macrophages and mast cells are present in the -
A)
Epithelium tissue
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B)
Connective tissue
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C)
Skeletal muscle tissue
done
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D)
Smooth muscle tissue
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View Answer play_arrow
Which of the following cells is/are contained in areolar connective tissue?
A)
Mast cells
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B)
Fibroblasts
done
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C)
Macrophages
done
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D)
All of these
done
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View Answer play_arrow
Go through the following statements regarding starch digestion. Separate true and false statements and select the correct option accordingly.
I. Digestion of starch starts from the mouth. II. Around 30% of the starch is digested in the stomach. III. Digestion of food requires the action of pancreatic juices. IV. Digestion of protein is completed in the longest part of the alimentary canal.
A)
All are true
done
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B)
III and IV are true while I and II is false
done
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C)
II and III are false while IV and I are true
done
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D)
II and IV are false while III and I are true
done
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View Answer play_arrow
Consider the following statements regarding the digestion and absorption of food in human and identify the correct and incorrect statements.
I. Antipellagra vitamin is nicotinamide which is present in milk, yeast, meat, leafy vegetable and whole grains. II. Deficiency of vitamin thiamine causes loss of appetite, muscle depreciation, fatigue and mental confusion. III. Prolonged deficiency of tocopherol reduces reproductive capacity in human being. IV. Gastrovascular cavity performs, i.e., both function digestion and distribution of nutrients.
Choose the correct option accordingly.
A)
All statements are correct
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B)
All statements are incorrect
done
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C)
I and II are correct only
done
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D)
I and II are incorrect only
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View Answer play_arrow
Choose the correct statement about the skeletal muscles.
A)
Their activities are under the voluntary
done
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B)
They are known as voluntary muscles
done
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C)
They are primarily involved in locomotory action and changes of body postures
done
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D)
All of the above
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View Answer play_arrow
In resting state, the axonal membrane is -
A)
Comparatively more permeable to \[N{{a}^{+}}\] ions and nearly impermeable of \[{{K}^{+}}\] ions
done
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B)
Equally permeable to both \[N{{a}^{+}}\] and \[{{K}^{+}}\] ions
done
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C)
Impermeable to both \[N{{a}^{+}}\]and \[{{K}^{+}}\]ions
done
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D)
Comparatively more permeable to \[{{K}^{+}}\] ions and nearly impermeable to \[N{{a}^{+}}\]ions
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View Answer play_arrow
The electrical potential difference across the plasma membrane when concentration of \[{{K}^{+}}\] is high inside axon and low outside axon is called as the -
A)
Action potential
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B)
Resting potential
done
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C)
Refractory potential
done
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D)
All of these
done
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View Answer play_arrow
In females the ...A... induces the ovulation of fully mature follicle called ...B... and maintain the ...C... formed from remnants of the Graafian follicle after ovulation. Select the correct combination in reference to the above given statement.
A)
A-LH, B-Graafian follicles, C-pregnancy
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B)
A-FSH, B-Graafian follicles, C-corpus luteum
done
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C)
A-FSH, B-Graafian follicles, C-pregnancy
done
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D)
A-LH, B-Graafian follicles, C-corpus luteum
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View Answer play_arrow
I. Hypothyroidism causes irregularity of menstrual cycle. II. Hyperthyroidism adversely affects the body physiology. III. Hypothyroidism cause myxedema IV. Hypothyroidism causes goiter. Which of the above statements are correct?
Choose the correct option.
A)
III and IV
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B)
I, II and IV
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C)
I, II and III
done
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D)
All of these
done
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View Answer play_arrow
Human ears perform primary sensory functions. These are -
A)
Hearing organs
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B)
Maintenance of body balance
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C)
Both [a] and [b]
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D)
Voice production
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View Answer play_arrow
Oxidation of one molecule of glucose in aerobic respiration result in the formation of-
A)
36 ATP molecules
done
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B)
40ATP moleules
done
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C)
3 ATP molecules
done
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D)
15 ATP molecules
done
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View Answer play_arrow
Which of the following statements are not incorrect?
A)
Number of proglottid in earthworm are 100-120
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B)
Number of respiratory malpighian tubule are 100-150 in cockroach
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C)
Number of segment in anal style of cockroach are -15
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D)
Number of nephridiopore is Aaximum in clitellar region of earthworm
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View Answer play_arrow
Choose incorrect statement -
[A] In cockroach?s heart blood flows anterior to posterior [B] Blood of cockroach consist of plasma and haemocyte. This haemocyte helps in gaseous transport during respiration by trachea [C] Vision in cockroach is mosaic vision also called as nocturnal vision because it is with less resolution and more sensitivity during night [D] External genitalia in male cockroach are represented by chitinous symmetrical structure phallomere
A)
One statement is incorrect
done
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B)
Two statements are incorrect
done
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C)
Three statements are incorrect
done
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D)
All statements are incorrect
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View Answer play_arrow
Read the following statements carefully -
[A] Setae of earthworm are S-shaped embedded in cuticular pits in middle of each segment except first, last and clitellum [B] Epidermis of earthworm consist of single layer of columnar epithelial cells without any secretory cells [C] Blood gland and pharyngeal nephridia located in same segments of earthworm [D] Nervous system in earthworm is basically represent by ganglia arranged segmentwise on the ventral paired nerve cord Now choose how many statements is/are correct?
A)
Four
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B)
Three
done
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C)
Two
done
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D)
One
done
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View Answer play_arrow
Choose correct set of marked parts given in following diagram-
A)
A-Vagina, B-Oviduct, C-Ovary
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B)
A- Vagina, B- Ureter, C- Ovary
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C)
A-Urinary bladder, B-Ova, C-Ovary
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D)
A-Urinary bladder, B-Ureter, C-Ovary
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View Answer play_arrow
Which of the following part marked in figure receives sperm from male cockroach during copulation?
A)
A
done
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B)
B
done
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C)
C
done
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D)
D
done
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View Answer play_arrow
Retrogressive metamorphosis occur in -
A)
Hemichordata
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B)
Cephalochordata
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C)
Urochordata
done
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D)
Vertebrata
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View Answer play_arrow
How many statements is/are true?
[A] Bilateral symmetry have only one plane of division [B] Only one plane can passes through central axis of the body divides the organism into two identically halves. It is called as radial symmetry. [C] In sponges cells arranged as loose cell aggregates. [D] In sponges division of labour occurs among cells.
A)
One
done
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B)
Two
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C)
Three
done
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D)
Four
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In contrast to chordate, non-chordates have following character-
[a] Notochord absent [b] Ventral heart [c] Ventral solid nerve cord [d] Post anal tail present
A)
All
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B)
[a] & [c]
done
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C)
All except [a]
done
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D)
[a], [c] & [d]
done
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View Answer play_arrow
What will happen if peritrophic membrane is not developed in codcroach-
A)
Absorption of food will be affected
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B)
Digestion of food stops
done
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C)
Midgut will be injured
done
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D)
Absorption of water from faeces stops
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View Answer play_arrow
Select that which of the following matches is not incorrect.
A)
Meandrina - Brain coral
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B)
Fasciola - Liver tapeworm
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C)
Living fossils - Locusta
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D)
Neries - Blood sucking leech
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View Answer play_arrow
Study the following statements and choose the correct option.
I. Buds are present in the axil of leaflets of the compound leaf. II. Pulvinus is present in leguminous plants. III. In Alstonia, the petioles expand, become green and synthesise food. IV. Opposite phyllotaxy is seen in guava.
A)
II and IV are correct but I and III are wrong
done
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B)
I and III are correct but II and IV are wrong
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C)
I and IV are correct but II and III are wrong
done
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D)
II,III and IV are correct but I is wrong
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View Answer play_arrow
Which of the following plants have long slender and coiled stem tendrils developed from axillary buds?
A)
Grapevine and pumpkins
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B)
Australian Acacia and watermelon
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C)
Boungainuillea and cucumber
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D)
Strawberry and grapevine
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View Answer play_arrow
The correct match for the edible part of fruit is-
A)
Guava - Pericarp with thalamus fused
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B)
Tomato - Thalamus
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C)
Maize - Cotyledon
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D)
Datepalm - Epicarp
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View Answer play_arrow
The diagram represent Miller?s experiment. Choose the correct combination of labelling -
A)
A-Electrodes \[B-N{{H}_{3}}+{{H}_{2}}+{{H}_{2}}O+C{{H}_{4}}\]C-Cold water, D-Vacuum, E-U-trap
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B)
A-Electrodes \[B-N{{H}_{4}}+{{H}_{2}}+C{{O}_{2}}+C{{H}_{3}}\]C-Hot water, D-Vacuum, E-U-trap
done
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C)
A-Electrodes \[B-N{{H}_{3}}+{{H}_{2}}O\]C-Steam, D-U-trap, E- Vacuum
done
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D)
A-Electrodes \[B-N{{H}_{3}}+{{H}_{2}}+{{H}_{2}}O+C{{H}_{4}}\]C-Steam, D-Vacuum, E-U-trap
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View Answer play_arrow
Interfascicular cambium is found -
A)
Between pith and vascular bundle
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B)
Between two vascular bundles
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C)
In the vascular bundle
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D)
Outside the bundle
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View Answer play_arrow
Of the statement given above -
I. In a dicot root, the vascular bundles are collateral and endarch. II. The inner most layer of cortex in a dicot root is endodermis. III. In a dicot root, the phloem masses are separated from the xylem by parenchymatous cells that are known as the conjuctive tissue.
A)
I is true but II and III are false
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B)
II is true but I and III are false
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C)
I is false but II and III are true
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D)
III is false but I and II are true
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View Answer play_arrow
Meristematic cells have -
A)
Thick cell wall and large intercellular spaces
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B)
Thick cell wall and no intercellular spaces
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C)
Thin cell wall and large intercellular spaces
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D)
Thin cell wall and no intercellular spaces
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View Answer play_arrow
Guard cells differ from other epidermal cells in having :-
A)
Large vacuoles
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B)
Secondary walls
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C)
Chloroplast with PEP-carboxylase enzyme
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D)
Absence of mitochondria
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View Answer play_arrow
The role of mitosis is not merely to divide cell into two daughter cells but to ensure genetic continuity from one cell generation to another generation-
A)
The formation of cells with new chromosomes
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B)
Formation of two haploid daughter cells
done
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C)
Formation of two cells with identical DNA
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D)
Having the chromosome number between the new cells
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Alee Jeffreys developed the DNA fingerprinting technique. The probe he used was -
A)
Ribozyme
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B)
Sex chromosomes
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C)
SNP
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D)
VNTR
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Pick out the wrong statement -
A)
Amino acids are substituted methanes
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B)
Glycerol is a trihydroxy propane
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C)
Lysine is a neutral amino acid
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D)
Lecithin is a phospholipid
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Which are indicated as ?A?, ?B? and ?C? in the given structure of DNA?
A)
\[A-0.34nm,\,\,\,\,\,\,B-3.4\overset{o}{\mathop{A}}\,\,\,\,\,\,\,\,\,C-20\overset{o}{\mathop{A}}\,\]
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B)
\[A-3.4nm\,\,\,\,\,B-0.34nm\,\,\,\,\,C-2nm\]
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C)
\[A-3.4\text{ }\overset{o}{\mathop{A}}\,,\,\,\,\,\,B-0.34\text{ }nm,~\,\,\,\,\,C-20\text{ }nm\]
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D)
\[A-3.4\text{ }\overset{o}{\mathop{A}}\,,~~~B-34\overset{o}{\mathop{A}}\,,~~~~C-20\overset{o}{\mathop{A}}\,\]
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What is common to whale, seal and shark?
A)
Seasonal migration
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B)
Thick subcutaneous fat
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C)
Convergent evolution
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D)
Homeottiermy
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An interconnecting membranous network of cell compound vesicles, flattened sacs and tubules is-
A)
Lysosome
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B)
Nucleus
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C)
Mitochondrion
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D)
Endoplasmic reticulum
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Choose the correct statement-
A)
Replication is dispersive in nature
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B)
Super helix relaxing protein is also called primase
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C)
DNA binding protein is also called helicase
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D)
All the statements given above are incorrect
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In alcohol fermentation -
A)
Triose phosphate is the electron donor, while acetaldehyde is the electron acceptor
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B)
Triose phosphate is the electron donor, while pyruvic acid is the electron acceptor
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C)
There is no electron donor
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D)
Oxygen is the electron acceptor
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Enzymes are sensitive to inhibitors. In bacteria folic acid synthesis is inhibited by sulpha drugs. The kind of inhibition is -
A)
Feedback inhibition
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B)
Allosteric inhibition
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C)
Noncompetitive inhibition
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D)
Competitive inhibition
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GM brinjal in India has been developed for resistance against -
A)
Virus
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B)
Bacteria
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C)
Fungi
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D)
Insects
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Select correct statements regarding food conduction -
A)
Phloem loading is a passive process while unloading is active process
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B)
Companian cells provide energy during unloading of sucrose in sink
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C)
Food is first loaded into sieve cell than in companion cell
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D)
Food conduction between source and sink end is active process
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Photosynthesis in \[{{C}_{4}}\] plants is relatively less limited by atmospheric \[C{{O}_{2}}\] levels because :
A)
Four carbon acids are the primary initial \[C{{O}_{2}}\] fixation products
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B)
The primary fixation \[C{{O}_{2}}\] is mediated via PEP carboxylase
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C)
Effective pumping of \[C{{O}_{2}}\] into bundle sheath cells
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D)
Rubisco in \[{{C}_{4}}\] plants has higher affinity for \[C{{O}_{2}}\]
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Protoplasmic proteins are used as a respiratory substrate only when-
A)
Carbohydrates are absent
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B)
Fats are absent
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C)
Both 1 & 2 are absent
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D)
Fats & carbohydrates are abundant
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In a long day plant flowering will not occurs when it provided -
A)
Light period more than critical day length
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B)
Night period less than critical night period
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C)
Critical night period is interrupted by red light
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D)
Night period more than critical night period
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The given kind of growth will observed in -
A)
Embryo development
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B)
Shoot apex
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C)
Formation of Seed
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D)
Seasonal activities
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Different biomes of world are represented in diagram. The A, B, C, D are respectively -
A)
Desert, Grassland, Tropical forest, Temperate forest
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B)
Arctic tudra. Desert, Temperate forest, Tropical forest
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C)
Grassland, Tropical forest, Temperate forest. Desert
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D)
Tropical forest. Temperate forest, Grassland Coniferous forest
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Which of the following ecological relationships between pairs of organisms is different from the other pairs?
A)
Fish-algae
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B)
Leaf rust (fungus) - wheat
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C)
Cow-grass
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D)
Giraffe-shrub
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What is the "carrying capacity" of a population?
A)
The rate at which the density of individuals increase over time
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B)
The maximum number of individuals which can be supported in given environment
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C)
The proportion of individuals which are most responsible for population growth
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D)
The minimum number of individuals necessary to avoid extinction of the population
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Given diagram depicts the concentration of different greenhouse gases. Here A, B, C, D are respectively -
A)
\[C{{O}_{2}},C{{H}_{4}},CFC,{{N}_{2}}O\]
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B)
\[{{N}_{2}}O,\text{ }C{{O}_{2}},\text{ }CFC,\text{ }C{{H}_{4}}\]
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C)
\[{{N}_{2}}O,CFC,C{{H}_{4}}C{{O}_{2}}\]
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D)
\[CFC,\text{ }C{{O}_{2}},\text{ }{{N}_{2}}O,\text{ }C{{H}_{4}}\]
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Global biodiversity of vertebrates other than fishes are represented as. A, B, C, D which are respectively -
A)
Birds, Mammals, Reptiles, Amphibians
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B)
Amphibians, Birds, Mammals, Reptiles
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C)
Reptiles, Birds, Amphibians, Mammals
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D)
Mammals, Birds, Reptiles Amphibians
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The natural phenomenon of keeping earth warm due to presence of certain gases in the atmosphere is called -
A)
Global warming
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B)
Ozone depletion
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C)
Greenhouse effect
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D)
El-Nine effect
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The transfer of energy through a terrestrial ecosystem is often depicted by energy pyramids. Which one of the following statement is true?
A)
Ecological efficiency is highest for top consumers
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B)
About 10% of the energy from one trophic level is incorporated into the biomass of the next level
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C)
The energy lost as the heat in cellular respiration is 10% of the available energy at each trophic level
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D)
Only 25% of energy in one trophic level is passed on to the next level
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The three cells A, B & C are joined in a linear manner. Demonstrate the movement of water & direction in these?
A)
\[A\to B\to C~\]
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B)
\[A\leftarrow B\leftarrow C~\]
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C)
\[A\to B\leftarrow C~\]
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D)
\[A\leftarrow B\to C~\]
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During injury mast cells secrete -
A)
Histamine
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B)
Heparin
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C)
Prothrombin
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D)
Antibodies
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For a gene if AA = male plant, BB = female plant. Find out the genotype of endosperm and embryo-
A)
AAB, BBA
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B)
AAB, AB
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C)
ABB, AB
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D)
BBA, AAB
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Which is showing accurate pairing -
A)
Syphilis - Treponema pallidum
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B)
AIDS - Bacillus conjugalis
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C)
Gonorrhoea - Leishmania denovoni
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D)
Typhoid - Mycobacterium leprae
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Match the following
Column-I Column-II [A] Down?s Syndrome (i) 44+XY [B] Klinefelter?s Syndrome (ii) 45+XY [C] Turner?s Syndrome (iii) 44+XO [D] Phenylketonuria (iv) 44+XXY
A)
A i B iv C iii D i
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B)
A ii B iv C iii D i
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C)
A i B ii C iii D iv
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D)
A i B ii C iv D iii
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If Mendel might have studied 7 pairs of characters in a plant with 12 chromosomes instead of 14 then -
A)
He could not discovered independent assortment
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B)
He might have discovered linkage
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C)
He might have discovered crossing over
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D)
He might have not observed dominance
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If a female having gene for haemophilia and colour-blindness on its one X-chromosome marries a normal male then what are the chances in their offsprings :
A)
50% son diseased and 50% normal
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B)
All normal off springs
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C)
100% daughters are carrier
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D)
100% son diseased
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First child of a normal male and female is albino, what are the chances of second child to be albino-
A)
25%
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B)
50%
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C)
75%
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D)
100%
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Extranuclear chromosomes occur in -
A)
Peroxisome and Ribosome
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B)
Chloroplast and Mitochondria
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C)
Mitochondria and Ribosome
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D)
Chloroplast and Lysosome
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Golgi complex and ER are disappear during ....A.... and reform during ....B.... A&B are
A)
Prophase and cytokinesis respectively
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B)
Metaphase and telophase respectively
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C)
Prophase and telophase respectively
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D)
Metaphase and cytokinesis respectively
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A crop scientist spliced genes for disease resistance into Ti plasmids and then treated tomato plants with the plasmids. Some parts of some plants resisted the disease, but most of the plants eventually died. The researcher could increase his chances of success by -
A)
Using molecular probes to figure out where to put genes
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B)
Treating single cells and cloning whole plant from the cells
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C)
Using R plasmids rather than Ti plasmids to introduce the genes
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D)
Inserting the genes into the cells of a tomato plant with a needle
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Which of the following exercise a control over transcription?
A)
Operator
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B)
Regulator
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C)
Promoter
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D)
Recon
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The end product of oxidative phosphorylation is-
A)
\[NAD{{H}_{2}}\]
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B)
Oxygen
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C)
ADP
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D)
\[ATP+{{H}_{2}}O\]
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Which of the following set of organisms reproduce by fragmentation (asexual mode of reproduction)?
A)
Amoeba, fungi and earthworm
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B)
Fungi, filamentous algae and protonema of mosses
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C)
Hydra, fungi, Amoeba and bacteria
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D)
Earthworm, bacteria and fungi
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Which of the following characters served as the criteria for five kingdom system of classification as used by Whittaker?
A)
Cell structure
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B)
Body organization and mode of nutrition
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C)
Reproduction and phylogenetic relationships
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D)
All of the above
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Gaucher?s disease is concerned with which of the following -
A)
Abnormal fat metabolism
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B)
Abnormal protein metabolism
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C)
Abnormal carbohydrate metabolism
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D)
None of them
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Mycorrhiza are mutualistic and have symbiotic associations between
A)
fungi and vascular plants
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B)
fungi and non-vascular plants
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C)
fungi and roots of higher plants
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D)
fungi and bryophytes
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In which of the families the stamens are in two whorls and epiphyllous -
A)
Malvaceae
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B)
Solanaceae
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C)
Liliaceae
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D)
Casalpinoideae
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In algae asexual reproduction occurs by the production of different types of spores. The most common type of spore is
A)
Aplanospore
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B)
Endospore
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C)
Zoospore
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D)
Oospore
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Consider the following statements about sexual reproduction in brown algae?
I. Sexual reproduction may be oogamous isogamous or anisogamous. II. Union of gametes take place in water or within the oogonium. III. The gametes are pear-shaped and bear two laterally attached flagella.
Which of the statements given above are correct?
A)
I and II
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B)
I and III
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C)
II and III
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D)
I, II and III
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In the life cycle of mosses, the gametophyte has two stages (A and B). These stages can be called
A)
A - Protonema; B - Leafy stage
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B)
A - Protonema; B - Sporogonium
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C)
A - Sporophyte; B - Gametophyte
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D)
A - Zygote; B - Spore mother cell
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In Geranium the seeds are dispersed by -
A)
Censor mechanism
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B)
Parachute mechanism
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C)
Explosive mechanism
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D)
None of the above
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Pollen grains have outer covering of sporopollenin which is synthesized by -
A)
Pollen grain itself
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B)
Protoplasm of middle layer
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C)
Protoplasm of tapetum
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D)
Sporogenous cells
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Plants with following features of flowers show-
[A] Large flower [B] Colourfull [C] Rich in nector [D] Fragrant
A)
Anemophilly
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B)
Zoophilly
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C)
Entomophilly
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D)
Hydrophilly
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Collenchyma differs from sclerenchyma in -
A)
Retaining protoplasm at maturity
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B)
Having thick walls
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C)
Having a wide lumen
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D)
Being meristematic
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In germinating seeds Amylase, Proteases, Lipases are stimulated by-
A)
Auxin
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B)
Gibberellin
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C)
Cytokinin
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D)
Ethylene
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Pacemaker of the heart in man is situated in -
A)
Interatrial septum
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B)
Interventricular septum
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C)
Wall of right atrium close to Eustachian valve
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D)
Wall of left atrium close to the opening of pulmonary veins
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"Bundle of His" is a network of -
A)
Nerve fibres distributed in ventricles
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B)
Nerve fibres found throughout the heart
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C)
Muscle fibres found only in the ventricle wall
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D)
Muscle fibres distributed throughout the heart walls
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The number of nephrons in a kidney is equal to-
A)
The number of Bowman's capsules
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B)
Sum of Bowman's capsules and glomeruli
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C)
Double the number of bowman's capsules
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D)
Sum of Bowman's capsules and Malpighian corpuscles
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Malpighian corpuscles can be divided into -
A)
Arteriole and glomerulus
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B)
Afferent and efferent arteriole
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C)
Arteriole and Bowman?s capsule
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D)
Bowman?s capsule and glomerulus
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Cholera patients are provided with saline drips as-
A)
\[NaCl\]is component of blood, maintains RBCs and helps dissolve proteins
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B)
\[N{{a}^{+}}\] is required for water retention in the body and selective transport across plasma membrane
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C)
\[C{{l}^{-}}\]is essential component of blood plasma
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D)
\[C{{l}^{-}}\]help form \[HCl\]in stomach
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Placenta is the region where -
A)
Maternal & fetal blood are mixed
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B)
Foetus is provided with mother?s blood
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C)
Foetus receives nourishment from mother?s blood
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D)
Foetus is covered by membranes
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The secretory phase in the human menstrual cycle is also called :
A)
Follicular phase lasting for about 6 days
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B)
Luteal phase and lasts for about 13 days
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C)
Follicular phase and lasts for about 13 days
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D)
Luteal phase and lasts for about 6 days
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Fertilization is -
A)
Union of diploid spermatozoon with diploid ovum to for diploid zygote
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B)
Union of haploid sperm with haploid ovum to form haploid zygote
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C)
Union of haploid sperm with haploid ovum to form diploid zygote
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D)
Union of diploid sperm with haploid ovum to form triploid zygote
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Extra-embryonic membranes of the mammalian embryo are derived from -
A)
Inner cell mass
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B)
Trophoblast
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C)
Formative cells
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D)
Follicle cells
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Which is incorrect about menstruation?
A)
At menopause there is abrupt increase in gonadotropic hormones
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B)
Beginning of cycle of menstruation is called menarche
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C)
About 40 mL of blood is lost during normal menstruation
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D)
Menstrual fluid can easily clot
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During the course of development cells in various regions of an embryo become different in appearance and perform diverse function this is called :
A)
Gastrulation
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B)
Differentiation
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C)
Meta morphosis
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D)
Organisation
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After a sperm has penetrated on ovum, entry of other sperm is prevented by -
A)
Condensation of yolk
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B)
Formation of pigment coat
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C)
Development of vitelline membrane
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D)
Development of fertilization membrane
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