Solved papers for BCECE Medical BCECE Medical Solved Papers-2008

BCECE Medical Solved Papers-2008 Total Questions - 150

1) If E = energy, G = gravitational constant, \[I=\] impulse and M = mass, then dimensions of \[\frac{GI{{M}^{2}}}{{{E}^{2}}}\] are same as that of

A)

time

B)

mass

C)

length

D)

force

View Answer
2) A point initially at rest moves along x-axis. Its acceleration varies with time as\[a=(6\,t+5)\,m/{{s}^{2}}\]. If it starts from origin, the distance covered in 2 s is

A)

20 m

B)

18 m

C)

16 m

D)

25 m

View Answer
3) Three blocks of masses 2 kg, 3 kg and 5 kg are connected to each other with light st ring and are then placed on a friction less surface as shown in the figure. The system is pulled by a force F = 10 N, then tension \[{{T}_{1}}=\]

A)

1 N

B)

5 N

C)

8N

D)

ION

View Answer
4) A solid sphere rolls down two different inclined planes of same height, but of different inclinations. In both cases

A)

speed and time of descent will be same

B)

speed will be same, but time of descent will be different

C)

speed will be different, but time of descent will be same

D)

speed and time of descent both are different

View Answer
5) The angular amplitude of a simple pendulum is\[{{\theta }_{0}}\]. The maximum tension in its string will be

A)

\[mg\,(1-{{\theta }_{0}})\]

B)

\[mg\,(1+{{\theta }_{0}})\]

C)

\[mg\,(1-\theta _{0}^{2})\]

D)

\[mg\,(1+\theta _{0}^{2})\]

View Answer
6) An engine pumps up 100 kg of water through a height of 10 m in 5s. Given that the efficiency of engine is 60%. If \[g=10\,m{{s}^{-2}}\], the power of the engine is

A)

3.3 kW

B)

0.33 kW

C)

0.033 kW

D)

33 kW

View Answer
7) At what speed, the velocity head of water is equal to pressure head of 40 cm of Hg?

A)

10.3 m/s

B)

2.8 m/s

C)

5.6 m/s

D)

8.4 m/s

View Answer
8) If the electric flux entering and leaving an enclosed surface respectively are \[{{\phi }_{1}}\] and \[{{\phi }_{2}}\], the electric charge inside the surface will be

A)

\[\frac{{{\phi }_{2}}-{{\phi }_{1}}}{{{\varepsilon }_{0}}}\]

B)

\[\frac{{{\phi }_{1}}+{{\phi }_{2}}}{{{\varepsilon }_{0}}}\]

C)

\[\frac{{{\phi }_{1}}-{{\phi }_{2}}}{{{\varepsilon }_{0}}}\]

D)

\[{{\varepsilon }_{0}}\,({{\phi }_{1}}+{{\phi }_{2}})\]

View Answer
9) In the propagation of light waves, the angle between the direction of vibration and plane of polarisation is

A)

\[{{0}^{o}}\]

B)

\[{{90}^{o}}\]

C)

\[{{45}^{o}}\]

D)

\[{{80}^{o}}\]

View Answer
10) A light emitting diode (LED) has a voltage drop of 2 V across it and passes a current of 10 mA. When it operates with a 6 V battery through a limiting resistor R, the value of R is

A)

\[40\,\,k\Omega \]

B)

\[4\,\,k\Omega \]

C)

\[200\,\,k\Omega \]

D)

\[400\,\,k\Omega \]

View Answer
11) The minimum potential difference between the base and emitter required to switch a silicon transistor ON is approximately

A)

IV

B)

3V

C)

5V

D)

4.2V

View Answer
12) Two stones are projected with the same speed but making different angles with the horizontal. Their horizontal ranges are equal. The angle of projection of one is \[\pi /3\] and the maximum height reached by it is 102 m. Then the maximum height reached by the other in metre is

A)

336

B)

224

C)

56

D)

34

View Answer
13) Which one of the following is a possible nuclear reaction?

A)

\[_{5}^{10}B+_{2}^{4}He\xrightarrow{{}}_{7}^{13}N+_{1}^{1}H\]

B)

\[_{11}^{23}Na+_{1}^{1}H\xrightarrow{{}}_{10}^{20}Ne+_{2}^{4}He\]

C)

\[_{93}^{293}Np\xrightarrow{{}}_{94}^{293}Pu+{{\beta }^{-}}+\overline{v}\]

D)

\[_{7}^{11}N+_{1}^{1}H\xrightarrow{{}}_{6}^{12}C+{{\beta }^{-}}+v\]

View Answer
14) Two circular discs A and B with equal radii are blackened. They are heated to same temperature and are cooled under identical conditions. What inference do you draw from their cooling curves?

A)

A and B have same specific heats

B)

Specific heat of A is less

C)

Specific heat of B is less

D)

Nothing can be said

View Answer
15) During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio \[{{C}_{p}}/{{C}_{V}}\]for the gas is

A)

4/3

B)

2

C)

5/3

D)

3/2

View Answer
16) The sum of two vectors \[\vec{A}\] and \[\vec{B}\] is at right angles to their difference. Then

A)

A = B

B)

A = 2B

C)

B = 2A

D)

\[\vec{A}\] and \[\vec{B}\] have the same direction

View Answer
17) A ball is thrown up at an angle with the horizontal. Then the total change of momentum by the instant it returns to ground is

A)

acceleration due to gravity x total time of flight

B)

weight of the ball x half the time of flight

C)

weight of the ball x total time of flight

D)

weight of the ball x horizontal range

View Answer
18) When a spring is stretched by a distance \[x\], it exerts a force, given by \[F=(-5x-16{{x}^{3}})N\] The work done, when the spring is stretched from 0.1 m to 0.2 m is

A)

\[8.7\times {{10}^{-2}}J\]

B)

\[12.2\times {{10}^{-2}}J\]

C)

\[8.7\times {{10}^{-1}}J\]

D)

\[12.2\times {{10}^{-1}}J\]

View Answer
19) Time period of a simple pendulum of length I is \[{{T}_{1}}\] and time period of a uniform rod of the same length \[l\] pivoted about one end and oscillating in a vertical plane is \[{{T}_{2}}\]. Amplitude of oscillations in both the cases is small. Then\[{{T}_{1}}/{{T}_{2}}\] is

A)

\[\frac{1}{\sqrt{3}}\]

B)

1

C)

\[\sqrt{\frac{4}{3}}\]

D)

\[\sqrt{\frac{3}{2}}\]

View Answer
20) An insulator plate is passed between the plates of a capacitor. Then current

A)

first flows from A to B and then from B to A

B)

first flows from B to A and then from A to B

C)

always flows from B to A

D)

always flows from A to B

View Answer
21) Two parallel large thin metal sheets have equal surface charge densities \[(\sigma =(26.4\times {{10}^{-12}}C/{{m}^{2}})\] of opposite signs. The electric field between these sheets is

A)

1.5 N/C

B)

\[1.5\times {{10}^{-10}}N/C\]

C)

3 N/C

D)

\[3\times {{10}^{-10}}N/C\]

View Answer
22) The electric current passes through a metallic wire produces heat because of

A)

collisions of conduction electrons with each other

B)

collisions of the atoms of the metal with each other

C)

the energy released in the ionization of the atoms of the metal

D)

collisions of the conduction electrons with the atoms of the metallic wire

View Answer
23) Two concentric circular coils of ten turns each are situated in the same plane. Their radii are 20 cm and 40 cm and they carry respectively 0.2 A and 0.3 A currents in opposite direction. The magnetic field in tesla at the centre is

A)

\[35{{\mu }_{0}}/4\]

B)

\[{{\mu }_{0}}/80\]

C)

\[7{{\mu }_{0}}/80\]

D)

\[5{{\mu }_{0}}/4\]

View Answer
24) Electromagnetic waves with frequencies greater than the critical frequency of ionosphere cannot be used for communication using sky wave propagation, because

A)

the refractive index of the ionosphere becomes very high for \[f>{{f}_{c}}\]

B)

the refractive index of the ionosphere becomes very low for \[f>{{f}_{c}}\]

C)

the refractive index of the ionosphere becomes very high for \[f>{{f}_{c}}\]

D)

None of the above

View Answer
25) In a choke coil, the reactance \[{{X}_{L}}\] and resistance R are such that

A)

\[{{X}_{L}}=R\]

B)

\[{{X}_{L}}>>R\]

C)

\[{{X}_{L}}<<R\]

D)

\[{{X}_{L}}=\infty \]

View Answer
26) Reverberation time does not depend upon

A)

temperature

B)

volume of room

C)

size of window

D)

carpet and curtain

View Answer
27) In a potentiometer, the null point is received at 7th wire. If now we have to change the null point at 9th wire, what should we do?

A)

Attach resistance in series with battery

B)

Increase resistance in main circuit

C)

Decrease resistance in main circuit

D)

Decrease applied emf

View Answer
28) If average velocity becomes 4 times then what will be the effect on rms velocity at that temperature?

A)

1.4 times

B)

4 times

C)

2 times

D)

\[\frac{1}{4}\]times

View Answer
29) What is the Q-value of the reaction \[p{{+}^{7}}Li{{\xrightarrow{{}}}^{4}}He{{+}^{4}}He\] The atomic masses of \[^{1}H,{{\,}^{4}}He\] and \[^{7}Li\] are 1.007825 u, 4.002603 u and 7.016004 u respectively

A)

17.35 MeV

B)

18.06 MeV

C)

177.35 MeV

D)

170.35 MeV

View Answer
30) A Carnots engine has an efficiency of 50% at sink temperature \[{{50}^{o}}C\]. Calculate the temperature of source.

A)

\[{{133}^{o}}C\]

B)

\[{{143}^{o}}C\]

C)

\[{{100}^{o}}C\]

D)

\[{{373}^{o}}C\]

View Answer
31) \[4\,\,{{m}^{3}}\] of water is to be pumped to a height of 20 m and forced into a reservoir at a pressure of \[2\times {{10}^{5}}N/{{m}^{2}}\]. The work done by the motor is (external pressure \[={{10}^{5}}N/{{m}^{2}}\])

A)

\[8\times {{10}^{5}}J\]

B)

\[16\times {{10}^{5}}J\]

C)

\[12\times {{10}^{5}}J\]

D)

\[32\times {{10}^{5}}J\]

View Answer
32) Moment of inertia of ring about its diameter is Then, moment of inertia about an axis passing through centre perpendicular to its plane is

A)

\[2I\]

B)

\[\frac{I}{2}\]

C)

\[\frac{3}{2}I\]

D)

\[I\]

View Answer
33) When both the listener and source are moving towards each other, then which of the following is true regarding frequency and wavelength of wave observed by the observer?

A)

More frequency, less wavelength

B)

More frequency, more wavelength

C)

Less frequency, less wavelength

D)

More frequency, constant wavelength

View Answer
34) The coefficient of friction between the tyres and the road is 0.25. The maximum speed with which car can be driven round a curve of radius 40 m without skidding is (assume \[g=10\,\,m{{s}^{-2}}\])

A)

\[40\,\,m{{s}^{-1}}\]

B)

\[20\,\,m{{s}^{-1}}\]

C)

\[15\,\,m{{s}^{-1}}\]

D)

\[10\,\,m{{s}^{-1}}\]

View Answer
35) A bomb of mass 3.0 kg explodes in air into two pieces of masses 2.0 kg and 1.0 kg. The smaller mass goes at a speed of 80 m/s. The total energy imparted to the two fragments is

A)

1.07 kJ

B)

2.14 kJ

C)

2.4 kJ

D)

4.8 kJ

View Answer
36) If distance between earth and sun become four times, then time period becomes

A)

4 times

B)

8 times

C)

1/4 times

D)

1/8 times

View Answer
37) An air bubble is contained inside water. It behaves as a

A)

concave lens

B)

convex lens

C)

Neither convex nor concave

D)

Cannot say

View Answer
38) The power dissipated across resistance R which is connected across a battery of potential V is P. If resistance is doubled, then the power becomes

A)

1/2

B)

2

C)

1/4

D)

4

View Answer
39) A 100 V, AC source of frequency 500 Hz is connected to an LCR circuit with L = 8.1 mH, C = 12.5 \[\mu F\], R = 10 \[\Omega \] all connected in series as shown in figure. What is the quality factor of circuit?

A)

2.02

B)

2.5434

C)

20.54

D)

200.54

View Answer
40) The inductance of a coil is \[L=10\,H\] and resistance \[R=5\,\Omega \]. If applied voltage of battery is 10 V and it switches off in 1 millisecond, find induced emf of inductor.

A)

\[2\times {{10}^{4}}V\]

B)

\[1.2\times {{10}^{4}}V\]

C)

\[2\times {{10}^{4}}V\]

D)

None of these

View Answer
41) A proton is moving in a uniform magnetic field B in a circular path of radius a in a direction perpendicular to z-axis along which field B exists. Calculate the angular momentum, if the radius is a charge on proton is e.

A)

\[\frac{Be}{{{a}^{2}}}\]

B)

\[e{{B}^{2}}a\]

C)

\[{{a}^{2}}eB\]

D)

\[aeB\]

View Answer
42) We wish to see inside an atom. Assuming the atom to have a diameter of 100 pm, this means that one must be able to resolve a width of say 10 pm. If an electron microscope is used, the minimum electron energy required is about

A)

1.5 keV

B)

15 keV

C)

150 keV

D)

1.5 MeV

View Answer
43) A body from height h is dropped. If the coefficient of restitution is e, then calculate the height achieved after one bounce.

A)

\[{{h}_{1}}={{e}^{2}}h\]

B)

\[{{h}_{1}}={{e}^{4}}h\]

C)

\[{{h}_{1}}=eh\]

D)

\[{{h}_{1}}=\frac{h}{e}\]

View Answer
44) A beam of light travelling along x-axis is described by the electric field \[{{E}_{y}}=(600\,\,V{{m}^{-1}})\,\sin \,\omega \,(t-x/c)\]then maximum magnetic force on a charge\[q=2e\], moving along y-axis with a speed of\[3.0\times {{10}^{7}}m{{s}^{-1}}\] is \[(e=1.6\times {{10}^{-19}}C)\]

A)

\[19.2\times {{10}^{-17}}N\]

B)

\[1.92\times {{10}^{-17}}N\]

C)

0.192 N

D)

None of these

View Answer
45) Equipotential surfaces associated with an electric field which is increasing in magnitude along the x-direction are

A)

planes parallel to \[Yz-plane\]

B)

planes parallel to \[xy\] -plane

C)

planes parallel to \[xz\]-plane

D)

coaxial cylinders of increasing radii around the x-axis

View Answer
46) If 200 MeV energy is released in the fission of a single nucleus of \[_{92}{{U}^{235}}\], how many fissions must occur per second to produce a power of 1 kW?

A)

\[3.12\times {{10}^{13}}\]

B)

\[3.12\times {{10}^{3}}\]

C)

\[3.1\times {{10}^{17}}\]

D)

\[3.12\times {{10}^{19}}\]

View Answer
47) Find ratio of acceleration due to gravity g at depth d and at height h, where\[d=2h\].

A)

1 : 1

B)

1 : 2

C)

2 : 1

D)

1 : 4

View Answer
48) A convex lens of focal length 40 cm is in contact with a concave lens of focal length 25 cm. The power of combination is

A)

-1.5D

B)

-6.5D

C)

+ 6.5D

D)

4- 6.67 D

View Answer
49) In a Youngs experiment, two coherent sources are placed 0.90 mm apart and the fringes are observed one metre away. If it produces the second dark fringe at a distance of 1 mm from the central fringe, the wavelength of monochromatic light used would be

A)

\[60\times {{10}^{-4}}cm\]

B)

\[10\times {{10}^{-4}}cm\]

C)

\[10\times {{10}^{-5}}cm\]

D)

\[6\times {{10}^{-5}}cm\]

View Answer
50) A bar magnet when placed at an angle of \[{{30}^{o}}\] to the direction of magnetic field induction of\[5\times {{10}^{-2}}T\], experiences a moment of couple\[25\times {{10}^{-6}}N-m\]. If the length of the magnet is 5 cm its pole strength is

A)

\[2\times {{10}^{-2}}A-m\]

B)

\[5\times {{10}^{-2}}A-m\]

C)

2 A-m

D)

5 A-m

View Answer
51) The number of moles of \[KMn{{O}_{4}}\] reduced by one mole of KI in alkaline medium is

A)

1

B)

5

C)

1/2

D)

1/5

View Answer
52) Value of \[x\] in potash alum,\[{{K}_{2}}S{{O}_{4}}.\,A{{l}_{x}}{{(S{{O}_{4}})}_{3}}\,.\,24{{H}_{2}}O\] is

A)

4

B)

1

C)

2

D)

None of these

View Answer
53) Ozone is used for purifying water because

A)

it dissociates and release oxygen

B)

do not leave any foul smell like chlorine

C)

kills bacteria, cyst, fungi and acts as a biocide

D)

All of the above

View Answer
54) Internal energy is sum of

A)

kinetic energy and potential energy

B)

all types of energy of the system

C)

energy of internal system

D)

None of the above

View Answer
55) Total volume of atoms present in a face centred cubic unit cell of a metal is (r = atomic radius)

A)

\[\frac{20}{3}\pi {{r}^{3}}\]

B)

\[\frac{24}{3}\pi {{r}^{3}}\]

C)

\[\frac{12}{3}\pi {{r}^{3}}\]

D)

\[\frac{16}{3}\pi {{r}^{3}}\]

View Answer
56) If two molecules of A and B having mass 100 kg and 64 kg and rate of diffusion of A is \[12\times {{10}^{-3}}\], then what will be the rate of diffusion of B?

A)

\[15\times {{10}^{-3}}\]

B)

\[64\times {{10}^{-3}}\]

C)

\[5\times {{10}^{-3}}\]

D)

\[46\times {{10}^{-3}}\]

View Answer
57) Aniline is prepared in presence of Fe/HCl from

A)

benzene

B)

nitrobenzene

C)

dinitrobenzene

D)

None of these

View Answer
58) Difference between S and \[{{S}^{2-}}\] as \[{{S}^{2-}}\] has

A)

larger radii and larger size

B)

smaller radii and larger size

C)

larger radii and smaller size

D)

smaller radii and smaller size

View Answer
59) Which of the following is not correct?

A)

\[{{t}_{1/2}}=\frac{0.693}{k}\]

B)

\[N={{N}_{0}}{{e}^{-kt}}\]

C)

\[\frac{1}{N}-\frac{1}{{{N}_{0}}}=\ln \,k{{t}_{t/2}}\]

D)

None of the above

View Answer
60) Which is not in accordance to Aufbau principle?

A)

B)

C)

D)

View Answer
61) \[C{{H}_{3}}C{{H}_{2}}Cl\] undergoes homolytic fission, produces

A)

\[C{{H}_{3}}\overset{\bullet }{\mathop{C}}\,{{H}_{2}}\] and \[\overset{\bullet }{\mathop{Cl}}\,\]

B)

\[C{{H}_{3}}\overset{\oplus }{\mathop{C}}\,{{H}_{2}}\]and \[C{{l}^{O-}}\]

C)

\[C{{H}_{3}}\overset{\oplus }{\mathop{C}}\,{{H}_{2}}\] and \[\overset{\bullet }{\mathop{Cl}}\,\]

D)

\[C{{H}_{3}}\overset{\bullet }{\mathop{C}}\,{{H}_{2}}\]and \[C{{l}^{O-}}\]

View Answer
62) C-C bond order in benzene is

A)

1

B)

2

C)

between 1 and 2

D)

None of these

View Answer
63) In colloid particles, range of diameter is

A)

1 to 100 nm

B)

1 to 1000 cm

C)

1 to 1000 mm

D)

1 to 100 km

View Answer
64) \[Z{{n}^{2+}}\xrightarrow{{}}Zn(s);\,\,{{E}^{o}}=-0.76\,\,V\] \[C{{u}^{2+}}\xrightarrow{{}}Cu(s);\,\,{{E}^{o}}=-0.34\,\,V\] Which of the following is spontaneous?

A)

\[Z{{n}^{2+}}+Cu\xrightarrow{{}}Zn+C{{u}^{2+}}\]

B)

\[C{{u}^{2+}}+Zn\xrightarrow{{}}Cu+Z{{n}^{2+}}\]

C)

\[Z{{n}^{2+}}+C{{u}^{2+}}\xrightarrow{{}}Zn+Cu\]

D)

None of the above

View Answer
65) Highest electron affinity among the following is

A)

fluorine

B)

chlorine

C)

sulphur

D)

xenon

View Answer
66) Which of the following noble gases is most reactive?

A)

He

B)

Ne

C)

Ar

D)

Xe

View Answer
67) Which one of the following is a correct set with respect to molecule, hybridisation and shape?

A)

\[BeC{{l}_{2}},\,s{{p}^{2}}\], linear

B)

\[BeC{{l}_{2}},\,s{{p}^{2}}\], triangular planar

C)

\[BeC{{l}_{3}},\,s{{p}^{2}}\], triangular planar

D)

\[BeC{{l}_{3}},\,s{{p}^{2}}\], tetrahedral

View Answer
68) \[{{H}_{2}}S\] is not a/an

A)

reducing agent

B)

acidic

C)

oxidising agent

D)

None of the above

View Answer
69) On doubling p and V with constant temperature, the equilibrium constant will

A)

remain constant

B)

become double

C)

become one-fourth

D)

None of the above

View Answer
70) What is the electronic configuration of \[M{{n}^{2+}}\]?

A)

\[[Ne]\,3{{d}^{5}},4{{s}^{0}}\]

B)

\[[Ar]\,3{{d}^{5}},4{{s}^{2}}\]

C)

\[[Ar]\,3{{d}^{5}},4{{s}^{0}}\]

D)

\[[Ne]\,3{{d}^{5}},4{{s}^{2}}\]

View Answer
71) Increase in atomic size down the group is due to

A)

increase in number of electrons

B)

increase in number of protons and neutrons

C)

increase in number of protons

D)

increase in number of protons, neutrons and electrons

View Answer
72) Which is tribasic acid?

A)

\[{{H}_{3}}P{{O}_{2}}\]

B)

\[{{H}_{3}}P{{O}_{4}}\]

C)

\[{{H}_{4}}{{P}_{2}}{{O}_{7}}\]

D)

\[{{H}_{3}}P{{O}_{3}}\]

View Answer
73) Highest ionising power is exhibited by

A)

\[\alpha \]-rays

B)

\[\beta \]-rays

C)

\[\gamma \]-rays

D)

X-rays

View Answer
74) Blister copper is

A)

impure Cu

B)

Cu alloy

C)

pure Cu

D)

Cu having 1% impurity

View Answer
75) Claisen condensation is not given by

A)

B)

C)

D)

View Answer
76) \[AgN{{O}_{3}}\] does not give precipitate with \[CHC{{l}_{3}}\] because

A)

\[CHC{{l}_{3}}\] does not ionise in water

B)

\[AgN{{O}_{3}}\] is chemically inert

C)

\[CHC{{l}_{3}}\] is chemically inert

D)

None of the above

View Answer
77) \[_{90}T{{h}^{228}}\xrightarrow{{}}\,{{\,}_{83}}B{{i}^{212}}\]

A)

\[4\,\alpha ,\,\,1\beta \]

B)

\[4\,\alpha ,\,\,2\beta \]

C)

\[5\,\alpha ,\,\,1\beta \],

D)

\[5\,\alpha ,\,\,2\beta \]

View Answer
78) Blood cells do not shrink in blood because blood is

A)

hypotonic

B)

isotonic

C)

equimolar

D)

hypertonic

View Answer
79) The compound in which underlined carbon uses only its \[s{{p}^{3}}\] hybrid orbitals for bond formation is

A)

\[C{{H}_{3}}\underline{C}OOH\]

B)

\[C{{H}_{3}}\underline{C}ON{{H}_{2}}\]

C)

\[C{{H}_{3}}\underline{C}{{H}_{2}}OH\]

D)

\[C{{H}_{3}}\underline{C}{{H}_{2}}=C{{H}_{2}}\]

View Answer
80) t-butyl alcohol is

A)

2-methyl propan-2-ol

B)

2-methyl propan-1-ol

C)

3-methyl butan-1-ol

D)

3-methyl butan-2-ol

View Answer
81) Optical isomerism is shown by

A)

propanol-2

B)

butanol-2

C)

ethanol

D)

methanol

View Answer
82) When \[{{C}_{2}}{{H}_{2}},\,C{{H}_{4}}\] and \[{{C}_{2}}{{H}_{4}}\] passes through a test tube which have ammoniacal \[C{{u}_{2}}C{{l}_{2}}\], find out which gas comes out unaffected from test tube?

A)

\[{{C}_{2}}{{H}_{2}}\] and \[C{{H}_{4}}\]

B)

\[{{C}_{2}}{{H}_{2}}\]and \[{{C}_{2}}{{H}_{4}}\]

C)

\[{{C}_{2}}{{H}_{4}}\] and \[C{{H}_{4}}\]

D)

\[{{C}_{2}}{{H}_{2}}\]

View Answer
83) When hydrogen molecules decomposed into ifs atoms which conditions gives maximum yield of H atoms?

A)

High temperature and low pressure

B)

Low temperature and high pressure

C)

High temperature and high pressure

D)

Low temperature and low pressure

View Answer
84) Natural rubber is a polymer of

A)

styrene

B)

chloroprene

C)

\[C{{H}_{2}}=\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,-CH=C{{H}_{2}}\] or isoprene

D)

1, 3-butadiene

View Answer
85) Which of the following compounds is aromatic?

A)



B)



C)



D)



View Answer
86) The value of \[\Lambda _{eq}^{\infty }\] for \[N{{H}_{4}}Cl,\,NaOH\] and NaCI are respectively, 149.74, 248.1 and\[126.4\,\,oh{{m}^{-1}}c{{m}^{2}}e{{q}^{-1}}\]. The value of \[\Lambda _{eq}^{\infty }\] of\[N{{H}_{4}}OH\]is

A)

371.44

B)

271.44

C)

71.44

D)

Cannot be predicted from given data

View Answer
87) Number of atoms of He in 100 u of He (atomic wt of He is 4) are

A)

25

B)

100

C)

50

D)

\[100\times 6\times {{10}^{-23}}\]

View Answer
88) Which has least gold number?

A)

Gelatin

B)

Starch

C)

Albumin

D)

Blood

View Answer
89) In a compound C, H and N are .present in 9 : 1 : 3.5 by weight. If molecular weight of the compound is 108, then the molecular formula. of the compound is

A)

\[{{C}_{2}}{{H}_{6}}{{N}_{2}}\]

B)

\[{{C}_{3}}{{H}_{4}}N\]

C)

\[{{C}_{6}}{{H}_{8}}{{N}_{2}}\]

D)

\[{{C}_{9}}{{H}_{12}}{{N}_{3}}\]

View Answer
90) In the following reaction \[{{C}_{2}}{{H}_{2}}\xrightarrow[HgS{{O}_{4}}/{{H}_{2}}S{{O}_{4}}]{{{H}_{2}}O}X\rightleftarrows C{{H}_{3}}CHO\], What is X?

A)

\[C{{H}_{3}}C{{H}_{2}}OH\]

B)

\[C{{H}_{3}}-O-C{{H}_{3}}\]

C)

\[C{{H}_{3}}C{{H}_{2}}CHO\]

D)

\[C{{H}_{2}}=CHOH\]

View Answer
91) Which one of the following will most readily be dehydrated in acidic conditions?

A)

B)

C)

D)

View Answer
92) Which of the following solutions will have \[pH=9\] at 298K?

A)

\[1\times {{10}^{-9}}M\,HCl\] solution

B)

\[1\times {{10}^{-5}}M\,NaOH\] solution

C)

\[1\times {{10}^{-9}}M\,KOH\] solution

D)

Both [a] and [b]

View Answer
93) The following data are for the decomposition of ammonium nitrite in aqueous solution.

Vol. of \[{{N}_{2}}\] in cc Time (min)

6.25 10

9.00 15

11.40 20

13.65 25

35.65 Infinity

The order of reaction is

A)

zero

B)

one

C)

two

D)

three

View Answer
94) An alkyl halide by formation of its Grignard reagent and heating with water yields propane. What is the original alkyl halide?

A)

Methyl iodide

B)

Ethyl iodide

C)

Ethyl bromide

D)

Propyl bromide

View Answer
95) The following reaction is known as

A)

Perkin reaction

B)

Gattermann reaction

C)

Kolbe reaction

D)

Gattermann-aldehyde reaction

View Answer
96) Aldehyde with \[N{{H}_{2}}\,.\,N{{H}_{2}}\] forms

A)

hydrazones

B)

aniline

C)

nitrobenzene

D)

None of these

View Answer
97) vant Hoff factor of \[Ca{{(N{{O}_{3}})}_{2}}\] is

A)

one

B)

two

C)

three

D)

four

View Answer
98) 1 mole of \[{{H}_{2}}\] and 2 moles of \[{{I}_{2}}\] are taken initially in a two litre vessel. The number of moles of \[{{H}_{2}}\] at equilibrium is 0.2. Then, the number of moles of \[{{I}_{2}}\] and HI at equilibrium are

A)

1.2, 1.6

B)

1.8, 1.0

C)

0.4, 2.4

D)

0.8, 2.0

View Answer
99) The volume of water to be added to \[100\,\,c{{m}^{3}}\] of 0.5 N \[{{H}_{2}}S{{O}_{4}}\] to get decinormal concentration is

A)

\[400\,\,c{{m}^{3}}\]

B)

\[450\,\,c{{m}^{3}}\]

C)

\[500\,\,c{{m}^{3}}\]

D)

\[100\,\,c{{m}^{3}}\]

View Answer
100) 1.520 g of hydroxide of a metal on ignition gave 0.995 g of oxide. The equivalent weight of metal is

A)

1.52

B)

0.995

C)

190

D)

9

View Answer
101) Which is gonadotropin hormone?

A)

GH

B)

MSH

C)

ADH

D)

FSH and LH

View Answer
102) Bowmans capsule is found in

A)

glomerulus

B)

uriniferous tubule

C)

nephron

D)

Malpighian capsule

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103) During starvation what will be sequence of ending of food stuffs?

A)

Carbohydrate-fat-protein

B)

Carbohydrate - protein -fat

C)

Fat-protein-carbohydrate

D)

Fat -carbohydrate - protein

View Answer
104) Husband has blood group A and wife has blood group B. What is the blood group of children?

A)

A

B)

B

C)

AB

D)

A, B, AB and O

View Answer
105) The fruit of Solanaceae is

A)

berry or capsule

B)

pome

C)

legume or pod

D)

drupe

View Answer
106) \[{{O}_{3}}\] depletion is due to

A)

PAN

B)

\[N{{O}_{x}}\]

C)

CFCs

D)

sulphates

View Answer
107) Initiation codon is

A)

AUG

B)

UUU

C)

UAG

D)

AAG

View Answer
108) Mark the correct sequence of layers found in root anatomy

A)

Epiblema, cortex, endodermis, pericycle

B)

Cortex, epiblema, pericycle, endodermis

C)

Epiblema, cortex, pericycle, endodermis

D)

Cortex, epiblema, endodermis, epidermis

View Answer
109) Crypts of Leiberkuhn is present in

A)

small intestine

B)

liver

C)

stomach

D)

colon

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110) A fruit in which seed coat and fruit wall is fused known as caryopsis present in

A)

wheat

B)

sunflower

C)

mango

D)

tomato

View Answer
111) Which is absent in a leaf?

A)

Lenticel

B)

Stomata

C)

Mesophyll

D)

Chloroplast

View Answer
112) Which is a sex linked disease?

A)

Sickle cell anaemia

B)

Haemophilia

C)

Phenylketonuria

D)

Albinism

View Answer
113) In gyandromorphs

A)

some cells of body contain XX and some cells with genotype XY

B)

all cells have XX genotype

C)

all cells have XY genotype

D)

all cells with genotype XXY

View Answer
114) Catalytic converter in vehicle is used for controlling

A)

air pollution

B)

water pollution

C)

radioactive pollution

D)

soil pollution

View Answer
115) Bile salts help in

A)

digestion of fat

B)

digestion and absorption of fat

C)

digestion of protein

D)

digestion of protein and fat

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116) Spore of Funaria on germination gives rise to

A)

protonema

B)

sporophyte

C)

prothallus

D)

capsule

View Answer
117) Maximum numbers of vascular bundles are present in

A)

monocot stem

B)

monocot root

C)

dicot stem

D)

dicotroot

View Answer
118) A vascular bundles without pith is

A)

protostele

B)

siphonostele

C)

solenostele

D)

None of these

View Answer
119) Ulothrix releases zoospore during

A)

evening

B)

morning

C)

night

D)

noon

View Answer
120) A circulatory system, which is formed by capillaries and ends with capillaries is

A)

renal

B)

hepatic

C)

double circulatory system

D)

hypophysial

View Answer
121) Theory of natural selection was given by

A)

Lamarck

B)

Darwin

C)

Wallace

D)

Weismann

View Answer
122) In photosynthesis \[NADP{{H}_{2}}\] is formed but in respiration ifs forms during

A)

HMP

B)

ETS

C)

Krebs cycle

D)

None of these

View Answer
123) Term New Systematic was given by

A)

Julian Huxley

B)

Bateson

C)

Linnaeus

D)

Darwin

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124) Adrenalin and nor-adrenalin are hormones and acts as

A)

energy producing agent

B)

food storage material

C)

neuro transmitter

D)

energy storing substances

View Answer
125) In which cell organelles a lipoprotein covering is absent in?

A)

Ribosomes

B)

Lysosomes

C)

Mitochondria

D)

Peroxisomes

View Answer
126) Enveloped virus enters into host cells by

A)

injecting own nucleic acid inside host cells

B)

by contact with cell receptor and endocytosis

C)

by phagocytosis

D)

fusion with the plasma membrane of host

View Answer
127) On selfing RrTt we produce 400 plant, find out number of plants with genotype RrTt

A)

100

B)

225

C)

50

D)

300

View Answer
128) Auxin causes

A)

growth of apical bud

B)

growth of lateral bud

C)

seed dormancy

D)

fall of leaf

View Answer
129) Which of the following set contains only homologous organs?

A)

Whales flipper, horses forelimb, human hand

B)

Wings of butterfly, crow and insect

C)

Horses forelimb, insect wing, human hand

D)

Vermiform appendix, body hair, and patella

View Answer
130) Quinine used for treatment of malarial fever extracted from

A)

Atropa belladona

B)

Cinchona officinalis

C)

Aconitum napellus

D)

Rauwolffia serpentine

View Answer
131) Salivary gland in earthworm is found in

A)

dorsal wall of buccal cavity

B)

ventral wall of buccal cavity

C)

pharyngeal wall

D)

None of the above

View Answer
132) Layers of an ovum from outside to inside is

A)

corona radiata, zoria pellucida and vitelline membrane

B)

zona pellucida, corona radiata and vitelline membrane

C)

vitelline membrane, zona pellucida and corona radiata

D)

zona pellucida, vitelline membrane and corona radiate

View Answer
133) Longest loop of Henie is found in

A)

kangaroo rat

B)

opposum

C)

rhesus monkey

D)

All of these

View Answer
134) Which of the following is not the character of Taenia solium?

A)

Apolysis

B)

Proglottid

C)

Metamerism

D)

Strobila

View Answer
135) If AAbb \[\times \] aaBB, then phenotypic ratio of its progeny will be

A)

9 : 3 : 3 : 1

B)

1 : 2 : 1

C)

1 : 1 : 1 : 1

D)

4 : 1

View Answer
136) Nucellus forms which of the following part of fruit?

A)

Seed coat

B)

Perisperm

C)

Seed

D)

Raphe

View Answer
137) Which of the following are the indicators of pollution?

A)

Lichen

B)

Fungi

C)

Algae

D)

None of these

View Answer
138) A cell swells up when kept in

A)

hypotonic solution

B)

hypertonic solution

C)

isotonic solution

D)

All of the above

View Answer
139) If flowers are cut and dipped in dilute NaCI solution, then

A)

transpiration is low

B)

endo-osmosis occurs

C)

no bacterial growth takes .place

D)

absorption of solute inside flower cell takes place

View Answer
140) Opening and dosing of stomata is due to

A)

\[C{{a}^{2+}}\]

B)

\[N{{a}^{+}}\]

C)

\[{{K}^{+}}\]

D)

\[C{{l}^{-}}\]

View Answer
141) Which of the following characters are present in class Crustacea?

A)

Cephalothorax, gills and appendages

B)

Head and thorax, gills and appendages

C)

Cephalothorax, book gills and appendages

D)

Head and thorax, book gills and appendages

View Answer
142) Which of the following is not a concept of Lamarck?

A)

Environmental pressure causes variation

B)

Rate and survival of organism is different due to variation

C)

Inheritance of acquired character

D)

If an organ is used constantly it will continuously increase its size

View Answer
143) In which of the following features, Cycas resembles with angiosperms?

A)

Presence of vessels

B)

Circinate vernation

C)

Dichotomously branched leaves

D)

Pollen tube is the carrier of male gametes

View Answer
144) Transfer of any gene into a completely different organism can be done through

A)

genetic engineering

B)

tissue culture

C)

transformation

D)

None of the above

View Answer
145) Diatoms belong to which class?

A)

Phaeophyceae

B)

Bacillariophyceae

C)

Chlorophyceae

D)

Xanthophyceae

View Answer
146) Pneumotaxic centre is present in

A)

cerebrum

B)

cerebellum

C)

medulla oblongata

D)

pons varolii

View Answer
147) Which layer develops first during embryonic development?

A)

Ectoderm

B)

Mesoderm

C)

Ehdoderm

D)

Both [b] and [c]

View Answer
148) During inflammation which of the following is secreted by connective tissue?

A)

Heparin

B)

Histamine

C)

Serotonin

D)

Glucagon

View Answer
149) Stability of ecosystem depends upon

A)

primary productivity

B)

interchange between producers and consumers

C)

number of producers

D)

number of consumers

View Answer
150) What is C-value paradox?

A)

Haploid DNA content

B)

Huge variations in C-values between species

C)

Constant C-value for all species

D)

Diploid DNA content

View Answer