# Solved papers for RAJASTHAN PMT Rajasthan - PMT Solved Paper-2011

### done Rajasthan - PMT Solved Paper-2011

• question_answer1) Block A of mass 4 kg and block B of mass 6 kg are resting on a horizontal surface as shown in the figure. There is no friction between the block B and the horizontal surface. The coefficient of friction between the blocks is 0.2. If the value of $g=10\,m/{{s}^{2}},$ the maximum horizontal force F that can be applied on block B without any relative motion between A and B is

A) 20 N

B) 40 N

C) 60 N

D) 100 N

• question_answer2) A body is rotating with angular momentum L. If $I$is its moment of inertia about the axis of rotation, its kinetic energy of rotation is

A) $\frac{1}{2}I{{L}^{2}}$

B) $\frac{1}{2}IL$

C) $\frac{1}{2}{{I}^{2}}L$

D) $\frac{1}{2}\frac{{{L}^{2}}}{I}$

• question_answer3) The unit of surface tension is

A) N-m

B) N/m

C) $N-{{m}^{2}}$

D) N

• question_answer4) The velocity of water flowing in a non-uniform tube is 20 cm/s at a point where the tube radius is 0.2 cm. The velocity at another point, where the radius is 0.1 cm, is

A) 80 cm/s

B) 40 cm/s

C) 20 cm/s

D) 5 cm/s

• question_answer5) The excess pressure inside a soap bubble A is twice that in another soap bubble B. The ratio of volumes of A and B is

A) 1 : 2

B) 1 : 4

C) 1 : 8

D) 1 : 16

• question_answer6) A body at rest splits into three parts of mass m, m and 4m respectively. The two equal masses fly off perpendicular to each other and each with speed of v. The speed of 4m will be

A) $\frac{v}{2\sqrt{2}}$

B) $\frac{v}{\sqrt{2}}$

C) $\frac{v}{2}$

D) $\sqrt{2\,v}$

• question_answer7) 300 cal of heat is supplied to raise the temperature of 50 g of air from $20{}^\circ C$ to $30{}^\circ C$ without any change in its volume. Change in internal energy per gram of air is

A) zero

B) 0.6 cal

C) 1.2 cal

D) 6.0 cal

• question_answer8) The thermal capacity of any body is

A) a measure of its capacity to absorb heat

B) a measure of its capacity to provide heat

C) the quantity of heat required to raise its temperature by a unit degree

D) the quantity of heat required to raise the temperature of a unit mass of the body by a unit degree

• question_answer9) The absorptive power of a perfectly black body is

A) zero

B) infinite

C) 0.5

D) 1.0

• question_answer10) A diatomic molecule has

A) 1 degree of freedom

B) 3 degrees of freedom

C) 5 degrees of freedom

D) 6 degrees of freedom

• question_answer11) The work done by a gas taken through the closed process ABCA (see figure) is

A) $6{{P}_{0}}{{V}_{0}}$

B) $4{{P}_{0}}{{V}_{0}}$

C) ${{P}_{0}}{{V}_{0}}$

D) zero

• question_answer12) The displacement x as a function of time t of a simple harmonic motion is represented by

A) $\frac{{{d}^{2}}x}{d{{t}^{2}}}-{{A}^{2}}x=0$

B) $\frac{dx}{dt}+{{A}^{2}}x=0$

C) $\frac{{{d}^{2}}x}{dt}+{{A}^{2}}{{x}^{2}}=0$

D) $\frac{{{d}^{2}}x}{d{{t}^{2}}}+{{A}^{2}}x=0$

• question_answer13) The potential energy of spring when stretched by a distance x is E. The energy of the spring when stretched by x/2 is

A) E

B) E/2

C) E/4

D) E/6

• question_answer14) The air column in a pipe with both ends open vibrates with a fundamental frequency $f.$ If one of the ends of the pipe is closed, the fundamental frequency will be

A) $f$

B) $2f$

C) (0) $\frac{3}{2}f$

D) $\frac{f}{2}$

• question_answer15) The displacement $y$ of a particle varies with time t, in second, as $y=2\,\cos (\pi t+\pi /6)$. The time period of the oscillations is

A) 2s

B) 4s

C) 1s

D) 0.5s

• question_answer16) The number of beats per second resulting from the vibration${{x}_{1}}=a\,\cos \,500\,\pi t$ and${{x}_{2}}=a\,\cos \,508\,\pi t$ is

A) zero

B) 2

C) 4

D) 8

• question_answer17) A point object is placed at the focus of a double concave lens. The image is formed

A) at infinity

B) between the focus and the lens

C) at focus

D) between the focus and infinity

• question_answer18) A ray of light travelling in air is incident on a medium of refractive index$\mu .$ If the angle of refraction is twice the incident angle, the incident angle is

A) $\sin {{\,}^{-1}}\left( \frac{1}{2\mu } \right)$

B) $\sin {{\,}^{-1}}(2\mu )$

C) $\cos {{\,}^{-1}}(2\mu )$

D) $\cos {{\,}^{-1}}\left( \frac{1}{2\mu } \right)$

• question_answer19) Two coherent light sources emit light of the

A) same intensity

B) same pitch

C) constant but different wavelengths

D) same frequency having constant phase difference

• question_answer20) If in Fraunhofer diffraction due to a single slit, the slit width is increased, then the width .of the central maximum will

A) increase

B) decrease

C) not change

D) change depending upon the wavelength of light used

• question_answer21) The ratio of the coulomb to the gravitational force between two electrons is of the order of

A) ${{10}^{55}}$

B) ${{10}^{42}}$

C) ${{10}^{28}}$

D) ${{10}^{12}}$

• question_answer22) Work done in moving a charge Q from the point B(x = a, y = 0) to the point A(x = 0, y = a) in the field of charge +q at origin is

A) zero

B) $\frac{qQ}{4\pi {{\varepsilon }_{0}}(\sqrt{2}a)}$

C) $\frac{qQ}{4\pi {{\varepsilon }_{0}}(2a)}$

D) $\frac{qQ\sqrt{2}a}{4\pi {{\varepsilon }_{0}}}$

• question_answer23) A charge +Q is placed at the centre of a spherical surface of radius R. Another charge -Q/2 is placed at a distance of R/2 from the centre of the surface. A third charge -Q/2 is at a distance 3R/2 from the centre. The electrostatic flux linked with the surface is

A) zero

B) $\frac{Q}{2{{\varepsilon }_{0}}}$

C) $\frac{3Q}{2{{\varepsilon }_{0}}}$

D) $\frac{2Q}{{{\varepsilon }_{0}}}$

• question_answer24) The uniform electric field in the space between the plates of a parallel plate capacitor of plate separation d and plate areas A is E. The energy of this charged capacitor is

A) $\frac{1}{2}\frac{{{\varepsilon }_{0}}{{E}^{2}}}{Ad}$

B) ${{\varepsilon }_{0}}{{E}^{2}}Ad$

C) $\frac{1}{2}{{\varepsilon }_{0}}{{E}^{2}}Ad$

D) $\frac{1}{2}\frac{{{\varepsilon }_{0}}{{E}^{2}}}{Ad}$

• question_answer25) The capacity of a parallel plate capacitor without any dielectric is C. If the distance between the plates is doubled and the space between the plates is filled with a substance of dielectric constant 3, the capacity of the capacitor becomes

A) $\frac{1}{4}C$

B) $\frac{9}{2}C$

C) $\frac{2}{3}C$

D) $\frac{3}{2}C$

• question_answer26) The$SI$unit of electrostatic flux is

A) $V/{{m}^{2}}$

B) V-m

C) V/m

D) $V-{{m}^{2}}$

• question_answer27) A wire of length 1 m and cross-sectional area $4\times {{10}^{-9}}{{m}^{2}}$ is made of a metal of resistivity $6\times {{10}^{-8}}\Omega -m.$The potential difference needed to pass a current of 2 A in the wire is

A) 75 V

B) 50 V

C) 30 V

D) 10 V

• question_answer28) In the circuit shown, the resistance of the ammeter A and the battery are zero. Ammeter reads 0.2 A when the switch S is opened. When the switch S is closed, the ammeter will read

A) 0.1 A

B) 0.2 A

C) 0.3 A

D) 0.6 A

• question_answer29) The cold junction of a thermocouple is at $0{}^\circ C$. The thermo-emf $\varepsilon ,$ in volt, generated in this thermocouple varies with temperature $t\,\,{}^\circ C$ of the hot junction as $\varepsilon =6+4t-\frac{{{t}^{2}}}{32}$ The neutral temperature of the thermocouple is

A) $100{}^\circ C$

B) $76{}^\circ C$

C) $64{}^\circ C$

D) $50{}^\circ C$

• question_answer30) A bar magnet is placed in a non-uniform magnetic field. The bar magnet, in general, will experience

A) a linear force and no torque

B) a torque and no linear force

C) both a torque and a linear force

D) neither a torque nor a linear force

• question_answer31) Curie temperature is the temperature above which

A) paramagnetic material becomes diamagnetic

B) paramagnetic material becomes ferromagnetic

C) diamagnetic material becomes paramagnetic

D) ferromagnetic material becomes paramagnetic

• question_answer32) A circular coil PQRSP is placed in a uniform magnetic field. When a current flows through the coil, the force on the segment PQ is F. The force on the remaining segment QRSP is

A) 3F

B) -3F

C) F

D) -F

• question_answer33) A charged particle moves in a circle of radius R under the influence of a constant transverse magnetic field. The time period of revolution is

A) independent of R

B) proportional to R

C) proportional to$\frac{1}{R}$

D) proportional to $\frac{1}{{{R}^{2}}}$

• question_answer34) The eddy current loss in a transformer can be reduced by using a core material of

A) high density

B) low density

C) high resistivity

D) low resistivity

• question_answer35) The unit of mutual inductance of a coil can be expressed as

A) Wb-A

B) Wb/A

C) Wb/m

D) Wb-m

• question_answer36) If the values of resistance, inductive reactance and capacitive reactance in a series LCR AC circuit are $3\,\Omega ,$ $10\,\Omega$ and $6\,\Omega$ respectively, the total impedance of the circuit is

A) $25\,\Omega$

B) $\sqrt{7}\,\Omega$

C) $5\,\Omega$

D) $19\,\Omega$

• question_answer37) The potential difference V varies with time t as shown in the figure. The rms value of V is

A) ${{V}_{0}}$

B) $2{{V}_{0}}$

C) ${{V}_{0}}/2$

D) ${{V}_{0}}/\sqrt{2}$

• question_answer38) If the ionization potential of hydrogen atom is 13.6 eV, its energy in the n=3 is approximately

A) -1.14 eV

B) -1.51 eV

C) -3.4 eV

D) -4.53 eV

• question_answer39) The photoelectric work function of a metal is 3.3 eV. The threshold frequency for this metal is approximately

A) $3.3\times {{10}^{13}}\,Hz$

B) $8.0\times {{10}^{14}}\,Hz$

C) $1.65\times {{10}^{15}}\,Hz$

D) $9.9\times {{10}^{15}}\,Hz$

• question_answer40) A particle of mass$10\times {{10}^{-12}}$ kg is moving with a velocity $6\times {{10}^{-7}}$m/s Its de-Broglie wavelength is nearly

A) $\text{1}{{\text{0}}^{\text{-20}}}\,\text{m}$

B) $\text{1}{{\text{0}}^{\text{-16}}}\,\text{m}$

C) $\text{1}{{\text{0}}^{\text{-12}}}\,\text{m}$

D) $\text{1}{{\text{0}}^{\text{-8}}}\,\text{m}$

• question_answer41) The mass numbers of nuclei A and B are respectively 135 and 5. The ratio of their radii is

A) 1 : 3

B) 3 : 1

C) $\sqrt{27}:1$

D) $1:\sqrt{27}$

• question_answer42) The resistances of a semiconductor and of a conductor

A) increase with temperature

B) decrease with temperature

C) increases and decreases respectively with temperature

D) decreases and increases respectively with temperature

• question_answer43) The truth table

 A B Y 1 1 0 1 0 1 0 1 1 0 0 1
is of the

A) NAND gate

B) OR gate

C) NOT gate

D) AND gate

• question_answer44) The E and B vectors associated with an electromagnetic wave are

A) parallel to each other and are in the same phase

B) parallel to each other and are in opposite phases

C) perpendicular to each other and are in opposite phases

D) perpendicular to each other and are in the same phase

• question_answer45) The dimensions of energy per unit volume is the same as that of

A) torque

B) pressure

C) acceleration

D) force

• question_answer46) A uniform thin ring of mass 0.4 kg rolls without slipping on a horizontal surface with a linear velocity of 10 cm/s. The kinetic energy of the ring is

A) $4\times {{10}^{-3}}$

B) $4\times {{10}^{-2}}J$

C) $2\times {{10}^{-3}}J$

D) $2\times {{10}^{-2}}J$

• question_answer47) A car of mass 1000 kg travelling at a speed of 72 km/h hits a tree and comes to rest in 0.2 s. The average force on the car during the impact is

A) $36\times {{10}^{4}}N$

B) $1\times {{10}^{5}}N$

C) $36\times {{10}^{7}}N$

D) $36\times {{10}^{5}}N$

• question_answer48) The distance $x$ in metre, travelled by a panicle in time t second is given by $x=0.5{{t}^{3}}+2{{t}^{2}}$. The acceleration of the particle at t = 2 s is

A) $2\,m/{{s}^{2}}$

B) $4\,m/{{s}^{2}}$

C) $8\,m/{{s}^{2}}$

D) $10\,m/{{s}^{2}}$

• question_answer49) Assume the earth to be a sphere of radius R. If g is the acceleration due to gravity at any point on the earths surface, the mass of the earth is

A) $\frac{gR}{G}$

B) $\frac{{{g}^{2}}{{R}^{2}}}{G}$

C) $\frac{g{{R}^{2}}}{G}$

D) $\frac{{{g}^{2}}R}{G}$

• question_answer50) A body is projected with kinetic energy T at the angle of maximum range. Its kinetic energy at the highest point of the trajectory will be

A) T

B) $\text{T/}\sqrt{\text{2}}$

C) T/2

D) zero

• question_answer51) Aqueous solutions of lithium salts are not good conductors of electricity, because of

A) high hydration energy of $L{{i}^{+}}$ ion

B) high ionization energy of $L{{i}^{+}}$ ion

C) small size of $L{{i}^{+}}$ ion

D) non-metallic character of $L{{i}^{+}}$ ion

• question_answer52) For the equation$2A+BB{{A}_{2}}$, the equilibrium concentration of $A,\,\,B,\,\,B{{A}_{2}}$ is 4, 2 and 2 respectively. The value of ${{K}_{c}}$ will be

A) $0.0625$

B) $0.625$

C) $6.280$

D) $6.250$

• question_answer53) Relationship between equilibrium constant $({{K}_{c}})$ and Gibbs energy $(\Delta {{G}^{o}})$ at temperature $T$ may be given by the expression

A) $\Delta {{G}^{o}}=-{{K}_{c}}\log RT$

B) $\Delta {{G}^{o}}=-RT\log {{K}_{c}}$

C) $\Delta {{G}^{o}}=-\frac{\log RT}{{{K}_{c}}}$

D) $\Delta {{G}^{o}}=-\log \frac{{{K}_{c}}}{RT}$

• question_answer54) Given for $HA$ acid, ${{K}_{a}}={{10}^{-6}}$ and for$MOH$ base,${{K}_{b}}={{10}^{-6}}.$ The $pH$ of $0.1\,\,M\,\,MA$ salt solution will be

A) 5

B) 7

C) 9

D) 2

• question_answer55) The $pH$ of an aqueous solution of a $1\times {{10}^{-7}}M$ solution of $HCl$ will be

A) 7

B) slightly less than 7

C) slightly greater than 7

D) 1

• question_answer56) What will be the concentration ${{H}^{+}}$ ions in $0.1\,\,M$ acetic acid and $0.1\,\,M$ sodium acetate solution, if the dissociation constant of acetic acid is$1.8\times {{10}^{-5}}$?

A) $1.8\times {{10}^{-7}}$

B) $1.8\times {{10}^{-5}}$

C) $1.8\times {{10}^{-2}}$

D) $1.8\times {{10}^{-3}}$

• question_answer57) A system absorbs reversibly $600\,\,J$ of heat and preforms $250\,\,J$ of work. The increase in the internal energy of system is

A) $850\,\,J$

B) $250\,\,J$

C) $600\,\,J$

D) $350\,\,J$

• question_answer58) For the reaction $A+2B\xrightarrow[{}]{{}}$Products, the differential rate equation is

A) $-\frac{1}{2}\frac{d[A]}{dt}=\frac{-d[B]}{dt}=k[A]{{[B]}^{2}}$

B) $\frac{1}{2}-\frac{d[A]}{dt}=\frac{d[B]}{dt}=k[A]{{[B]}^{2}}$

C) $\frac{-d[A]}{dt}=-\frac{1}{2}\frac{d[B]}{dt}=k[A]{{[B]}^{2}}$

D) $\frac{d[A]}{dt}=\frac{1}{2}\frac{d[B]}{dt}=k[A]{{[B]}^{2}}$

• question_answer59) For reversible melting of ice at ${{0}^{o}}C$ and $1\,\,atm$. pressure, the value of $\Delta G$ will be

A) $\text{0(zero)}$

B) $\text{0(zero)}$

C) $\text{0(zero)}$

D) $\infty (\text{infinity})$

• question_answer60) The ${{t}_{1/2}}$ of a reaction is halved as the initial concentration of the reactant is doubled. What is the order of reaction?

A) First order

B) Zero order

C) Second order

D) Third order

• question_answer61) Fog is a colloidal system of

A) gas in liquid

B) liquid in gas

C) gas in gas

D) gas in solid

• question_answer62) Semi-permeable membrane allows

A) a solution to pass through it

B) solute to pass through it

C) solvent to pass through it

D) both the solute and solvent to pass through it

• question_answer63) The molarity of a solution containing $5\,\,g$ of $NaOH$ in $450\,\,mL$ solution will be

A) $0.189\,\,mol\,\,d{{m}^{-3}}$

B) $0.278\,\,mol\,\,d{{m}^{-3}}$

C) $0.556\,\,mol\,\,d{{m}^{-3}}$

D) $0.027\,\,mol\,\,d{{m}^{-3}}$

• question_answer64) The oxidation state of sulphur in ${{H}_{2}}S{{O}_{5}}$ and of chromium in ${{K}_{2}}C{{r}_{2}}{{O}_{7}}$ respectively is

A) $8,\,\,6$

B) $4,\,\,6$

C) $8,\,\,8$

D) $6,\,\,6$

• question_answer65) If the cell reaction is spontaneous, then

A) ${{E}^{o}}=-ve$

B) ${{E}^{o}}=+ve$

C) $emf=+ve$

D) $(\Delta G+{{E}^{o}})=+ve$

• question_answer66) For the $Zn-Cu$ cell,${{E}^{o}}=1.10\,\,V.$ If the reduction potential of $C{{u}^{2+}}(aq)|Cu(s)$ couple is $0.34\,\,V$, then the reduction potential of $Z{{n}^{2+}}(aq)|Zn(s)$ couple will be

A) $-0.76\,\,V$

B) $0.76\,\,V$

C) $7.6\,\,V$

D) $0.38\,\,V$

• question_answer67) An example of a cyclic silicate is

A) beryl

B) zeolite

C) talc

D) feldspar

• question_answer68) Which halide is unknown?

A) $Tl(III)$iodide

B) $\ln (III)$bromide

C) $Ga(III)$fluoride

D) $B(III)$chloride

• question_answer69) Colourless ion-pair is

A) $C{{u}^{+}},\,\,Z{{n}^{2+}}$

B) $C{{u}^{2+}},\,\,Z{{n}^{2+}}$

C) ${{V}^{3+}},\,\,C{{r}^{3+}}$

D) $M{{n}^{3+}},\,\,F{{e}^{3+}}$

• question_answer70) Similar sizes of second and third transition elements can be explained on the basis of

A) inert-pair effect

B) screening effect

C) lanthanide contraction

D) increasing effective nuclear charge

• question_answer71) A transitional metal complex adopts ${{t}_{2g}}^{4}e_{g}^{2}$ configuration. The nature of ligand surrounding the ion is

A) strong field

B) weak field

C) neutral

D) $+ve$ field

• question_answer72) Ether and benzene can be separated by

A) filtration

B) distillation

C) crystallization

D) sublimation

• question_answer73) Consider the following compounds Correct order of their reactivity in electrophilic substitution reactions would be

A) $I>II>III>IV$

B) $IV>III>II>I$

C) $III>II>I>IV$

D) $III>IV>I>II$

• question_answer74) Ozonolysis of a hydrocarbon gives one mole of acetone and one mole of formaldehyde. The hydrocarbon is

A) propene

B) 2-methylpropene

C) 2-methyl-2-butene

D) 2-methyl-1-butene

• question_answer75) In the free-radical halogenation of alkanes, chain propogating step is

A) $C{{l}_{2}}\xrightarrow{hv}2C{{l}^{\bullet }}$

B) $C{{H}_{4}}+C{{l}^{\bullet }}\xrightarrow{{}}C{{H}_{3}}Cl+{{H}^{\bullet }}$

C) $C{{H}_{4}}+C{{l}^{\bullet }}\xrightarrow{{}}CH_{3}^{\bullet }+HCl$

D) $CH_{3}^{\bullet }+C{{l}^{\bullet }}\xrightarrow{{}}C{{H}_{3}}Cl$

• question_answer76) Correct $IUPAC$ name is

A) 3-methyl-2-ethylpentane

B) 2-ethyl-3-methylpentane

C) 3-ethyl-2-methylpentane

D) 2-ethyl-2-methylpentane

• question_answer77) By heating which mixture propane nitile be obtained?

A) Ethyl alcohol$+KCN$

B) Propyl alcohol$+KCN$

C) Ethyl chloride$+KCN$

D) Propyl chloride$+KCN$

• question_answer78) A is

A)

B)

C) $1:1$ mixture of both (a) and (b)

D) $C{{H}_{3}}-CH=CH-C{{H}_{3}}$

• question_answer79) Correct increasing order of acidity of the following phenols is

A)

B)

C)

D)

• question_answer80) $p,\,\,s$ and $t-$alcohols can be distinguished by

A) Reimer-Tiemann reaction

B) Tollens reagent

C) Lucas test

D) Lassaignes test

• question_answer81) Major product of the reaction ${{(C{{H}_{3}})}_{3}}C-Cl+{{C}_{2}}{{H}_{5}}ONa\xrightarrow{{}}$ would be

A) ${{(C{{H}_{3}})}_{2}}C-O{{C}_{2}}{{H}_{5}}$

B) ${{(C{{H}_{3}})}_{3}}C-{{C}_{2}}{{H}_{5}}$

C) ${{(C{{H}_{3}})}_{2}}C=C{{H}_{2}}$

D) $C{{H}_{3}}-CH=CH-{{C}_{2}}{{H}_{5}}$

• question_answer82) Which of the following compounds would exhibit highest dipole moment?

A) Ethers

B) Alcohols

C) Carbonyl compounds

D) Carboxylic acids

• question_answer83) Ketones can be prepared by

A) Rosenmund reduction

B) Etard reaction

C) Cannizaro reaction

D) Friedel-Craft reaction

• question_answer84) Biuret test is characteristic of compounds containing the functional group

A)

B) $-N{{H}_{2}}$

C) $-CONH-$

D) $-C\equiv H$

• question_answer85) When propanoic acid is treated with aqueous sodium bicarbonate, $C{{O}_{2}}$ is liberated. The carbon of $C{{O}_{2}}$ comes from

A) methyl group

B) carboxylic acid group

C) methylene group

D) bicarbonate

• question_answer86) , the product P is

A)

B)

C)

D)

• question_answer87) Benzene diazonium chloride on treatment with ethanol gives

A) chlorobenzene

B) benzene

C) phenol

D) aniline

• question_answer88) ${{C}_{2}}{{H}_{5}}Cl\xrightarrow{N{{H}_{3}}}A\xrightarrow{{{C}_{2}}{{H}_{5}}Cl}B\xrightarrow{{{C}_{2}}{{H}_{5}}Cl}C$ $A,\,\,B$ and $C$ respectively are

A) ${{C}_{2}}{{H}_{5}}N{{H}_{2}},\,\,{{({{C}_{2}}{{H}_{5}})}_{2}}NH,\,\,{{({{C}_{2}}{{H}_{5}})}_{3}}N$

B) ${{C}_{2}}{{H}_{5}}N{{H}_{2}},\,\,{{C}_{2}}{{H}_{5}}NH-Cl,\,\,{{C}_{2}}{{H}_{5}}-NC{{l}_{2}}$

C) ${{C}_{2}}{{H}_{5}}N{{H}_{2}},\,\,C{{H}_{2}}=C{{H}_{2}},$$Cl-C{{H}_{2}}-C{{H}_{2}}-{{C}_{2}}{{H}_{5}}$

D) ${{C}_{2}}{{H}_{5}}N{{H}_{2}},\,\,{{({{C}_{2}}{{H}_{5}})}_{3}}N,\,\,{{({{C}_{2}}{{H}_{5}})}_{2}}NH$

• question_answer89) Heating a mixture of a primary alkyl amine and chloroform with ethanolic potassium hydroxide gives

A) alkyl chloride

B) alkyl alcohol

C) alkyl isocyanide

D) alkene

• question_answer90) Weakest intermolecular forces are present in

A) neoprene

B) terylene

C) polystyrene

D) bakelite

• question_answer91) Which among the following is a tranquilizer?

A) Equanil

B) Promethazine

C) Omeprazole

D) Cimetidine

• question_answer92) If the de-Broglie wavelength of the fourth Bohr orbit of hydrogen atom is$4\overset{\text{o}}{\mathop{\text{A}}}\,$, the circumference of the orbit will be

A) $4\overset{\text{o}}{\mathop{\text{A}}}\,$

B) $4\,\,nm$

C) $16\,\,\overset{\text{o}}{\mathop{\text{A}}}\,$

D) $16\,\,nm$

• question_answer93) The photoelectric work function depends upon the

A) nature of metal

B) intensity of radiation

C) time of radiation

D) kinetic energy of photoelectron

• question_answer94) The value of $n=2$ and $l=1$, the type of orbital would be

A) $2s$

B) $2p$

C) $1s$

D) $3p$

• question_answer95) The modern Periodic Table has been divided into

A) seven periods: three short and four long

B) nine periods: six short and three long

C) eighteen periods: ten short and eight long

D) nine periods from zero to VIII

• question_answer96) Among $K,\,\,{{K}^{+}},\,\,S{{r}^{2+}},\,\,Ar,$ which atom/ion will have the smallest radius?

A) ${{K}^{+}}$

B) $S{{r}^{2+}}$

C) $Ar$

D) $K$

• question_answer97) Which of the following is paramagnetic?

A) $O_{2}^{-}$

B) $C{{N}^{-}}$

C) $CO$

D) $N{{O}^{+}}$

• question_answer98) The fusible mass obtained from high melting oxide in the gangue is called

A) flux

B) slag

C) matte

D) matrix

• question_answer99) The melting point of $NaCl$ is high because

A) the distance between the ions is large

B) repulsion exists within $NaCl$ lattice

C) lattice energy is high

D) size of sodium as well as chlorine is big

• question_answer100) The bond angle in water molecule is less than in ammonia molecule, due to the

A) presence of two lone pairs in ${{H}_{2}}O$ molecule

B) presence of three lone pairs in ${{H}_{2}}O$ molecule

C) presence of two lone pairs in $N{{H}_{3}}$ molecule

D) high electronegativity of oxygen atom

• question_answer101) The endometrium is the lining of

B) vagina

C) uterus

D) oviduct

A) transfer of zygote into the fallopian tube

B) transfer of embryo into the uterus

C) transfer of mixture of sperms and ova into the fallopian tube

D) transfer of mixture of sperms and ova into the uterus

• question_answer103) Fusion of dissimilar gametes is known as

A) fertilization

B) dichogamy

C) autogamy

D) allogamy

• question_answer104) The process of translation is

A) DNA synthesis

B) RNA synthesis

C) protein synthesis

D) ribosome synthesis

• question_answer105) The codon for anti-codon$\text{3 }\!\!\!\!\text{ UUUA5 }\!\!\!\!\text{ }$ is

A) $\text{3 }\!\!\!\!\text{ -UUUA-5 }\!\!\!\!\text{ }$

B) $\text{5 }\!\!\!\!\text{ -UAAA-3 }\!\!\!\!\text{ }$

C) $\text{5 }\!\!\!\!\text{ -AAAU-3 }\!\!\!\!\text{ }$

D) $\text{3 }\!\!\!\!\text{ -UAAU-5 }\!\!\!\!\text{ }$

• question_answer106) A kind of biotechnology involving manipulation of DNA is

A) DNA replication

B) genetic engineering

C) denaturation

D) renaturation

• question_answer107) What is true for plasmid?

A) Found in viruses

B) Contains genes for vital activities

C) Part of nuclear chromosome

D) Widely used in gene transfer

• question_answer108) DNA fingerprinting technique was discovered by

A) Wilmut

B) A. Jeffreys

C) Ethoven

D) Kary Mullis

• question_answer109) The term Vaccine was introduced by

A) Jenner

B) Koch

C) Pasteur

D) Jointly by Koch and Pasteur

• question_answer110) The immune system is made of

A) humoral system

B) humoral and cell mediated systems

C) humoral and fibrous systems

D) antigen induced antibodies

• question_answer111) Minamata disease is caused due to presence of...... in water.

C) arsenic

D) mercury

• question_answer112) Amniocentesis detects

A) deformity in brain

B) deformity in heart

C) hereditary disease

D) All of the above

• question_answer113) Metastasis is associated with

A) malignant tumours

B) benign tumours

C) Both a and b

D) crown gall tumour

• question_answer114) Which was absent in the atmosphere at the time of origin of life?

A) $N{{H}_{3}}$

B) ${{H}_{2}}$

C) ${{O}_{2}}$

D) $C{{H}_{4}}$

• question_answer115) Organic compounds first evolved in earth required for origin of life were

A) urea and amino acids

B) proteins and nucleic acids

C) proteins and amino acids

D) urea and nucleic acids

• question_answer116) Homologous organs indicate the

A) convergent evolution

B) parallel evolution

C) common descendent

D) natural selection

• question_answer117) The first organism to be found on a bare rock is

A) moss

B) alga

C) lichen

D) fem

• question_answer118) The phrase Omnis cellula e cellula was given by

A) Virchow

B) Pasteur

C) Schleilden

D) Brown

• question_answer119) Starfish belongs to the class

A) Pisces

B) Cephalopoda

C) Asteroidea

D) Ophuroidea

• question_answer120) Which of the following is not an insect?

A) Ant

B) Mosquito

C) Spider

D) Locusts

• question_answer121) The canal system is characteristic feature of

A) sponges

B) helminthes

C) echinoderms

D) coelenterates

• question_answer122) In Protozoa, like Amoeba and Paramecium, the organ found for osmoregulation is

A) nucleus

B) food vacuole

C) mitochondria

D) contractile vacuole

• question_answer123) Which of the following organisms is pseudocoelomate?

A) Hookworm

B) Liver fluke

C) Jellyfish

D) Leech

• question_answer124) Mammals heart is

A) myogenic

B) neurogenic

C) voluntary

D) sympathetic

• question_answer125) Natural parthenogenesis is found in

A) housefly

B) honey bee

C) Drosophila

D) All of these

• question_answer126) Which of the following snake is non-poisonous?

A) Cobra

B) Krait

C) Viper

D) Pyrhon

• question_answer127) A group of animals having marsupium is

A) Monotremata

B) Eutheria

C) Metatheria

D) Pantotheria

• question_answer128) Which of the following belongs to Phylum- Arthropoda?

A) Starfish

B) Goldfish

C) Silver fish

D) Cuttlefish

• question_answer129) Browsing by animals is an example of

A) Parasitism

B) predation

C) Commensalism

D) ferns

• question_answer130) Intermediate community between pioneer and climax communities is called

A) seral community

B) biotic community

C) temporary community

D) ecosere

• question_answer131) In parasitic food chain, the pyramid of number is

A) inverted

B) upright

C) linear

D) Both a and b

• question_answer132) Ten per cent law of energy transfer in a food chain is given by

A) Schimper

B) Eiton

C) Haeckel

D) Lindemann

• question_answer133) In a food chain the largest population is that of

A) producers

B) decomposers

C) secondary consumers

D) primary consumers

• question_answer134) Initiation codon is

A) AUG

B) AGU

C) AAU

D) AUA

• question_answer135) Apoenzyme is

A) protein

B) carbohydrate

C) vitamin

D) amino acid

• question_answer136) Which amino acids are present in histones?

A) Lysine and histidine

B) Valine and histidine

C) Arginine and lysine

D) Arginine and histidine

• question_answer137) Glycogenolysis involves

A) conversion of sugar into glycogen

B) oxidation of sugar

C) conversion of glycogen into sugar

D) conversion of glycogen into fat

• question_answer138) The two strands of the DNA double helix are

A) held together by

B) hydrogen bonds

C) hydrophobic bonds

D) peptide bonds phosphodiester bonds

• question_answer139) A polygenic inheritance in human beings is

A) skin colour

B) sickle cell anaemia

C) colour blindness

D) phenylketonuria

• question_answer140) A woman with albinic father marries an albinic man. The proportion of her progeny is

A) 2 normal: 1 albinic

B) all normal

C) all albinic

D) 1 normal: 1 albinic

• question_answer141) A cross between pure tall pea plant with green pods and dwarf pea with yellow pods will produce tall F2 plants, out of 16

A) 15

B) 13

C) 12

D) 7

• question_answer142) Dihybrid cross is related to the principle of

A) dominance

B) segregation

C) independent assortment

D) Hybridization

• question_answer143) Emasculation is related to

A) pure line

B) mass selection

C) clonal selection

D) hybridization

• question_answer144) Which sound producing organ is found in bird?

A) Pharynx

B) Larynx

C) Syrinx

D) Trachea

• question_answer145) During expiration, the diaphragm becomes

A) normal

B) flattened

C) dome-shaped

D) oblique

• question_answer146) Serum is

A) blood without fibrinogen

B) lymph without corpuscles

C) blood without corpuscles and fibrinogen

D) lymph

• question_answer147) In a healthy adult man the normal diastolic pressure is

A) 90 mm Hg

B) 120 mm Hg

C) 80 mm Hg

D) 100 mm Hg

• question_answer148) The joint of radio-ulna with the upper arm is

A) hinge joint

B) pivot joint

C) socket joint

D) None of these

• question_answer149) Sertoli cells are found in

A) heart

B) liver

C) germinal epithelium

D) seminiferous tubules

• question_answer150) At the time of implantation, the human embryo is called

A) embryo

B) blastocyst

C) zygote

D) foetus

• question_answer151) Nucleic acid segment tagged with a radiactive molecule is called

A) clone

B) probe

C) plasmid

D) vector

• question_answer152) GM brinjal in India has been developed for resistance against

A) virus

B) bacteria

C) fungi

D) insects

• question_answer153) The drug cyclosporin used for organ transplant patients is obtained from a

A) bacterium

B) fungus

C) virus

D) plant

• question_answer154) A common biocontrol agent for the control of plant diseases

A) Agrobacterium

B) Glomus

C) Trichoderma

D) Baculovirus

• question_answer155) Powdery mildew of wheat is caused by a species of

A) Puccinia

B) Erysiphe

C) Ustilago

D) Albugo

• question_answer156) In paddy fields biological nitrogen fixation is chiefly brought by

A) cyanobacteria

B) green algae

C) mycorrhiza

D) Rhizobium

• question_answer157) An important drug is obtained from the bark of

A) Papaver

B) Cinchona

C) Withania

D) Momordica

• question_answer158) Germplasm conservation in situ is done by

A) biosphere reserves

B) botanical gardens

C) germplasm banks

D) pollen banks

• question_answer159) In five-kingdom classification, Euglena is placed in

A) Monera

B) Protista

C) Fungi

D) Animalia

• question_answer160) Nucleic acid is absent in

A) virus

B) viroid

C) prion

D) mycoplasma

• question_answer161) In most fungi, cell wall is chiefly made of

A) cellulose

B) chitin

C) protein

D) lipid

• question_answer162) Sporophyte is not an independent generation in

A) bryophytes

B) pteridophytes

C) gymnospenns

D) angiosperms

• question_answer163) Both pteridophytes and gymnospenns have

A) seeds

B) independent gametophytes

C) archegonia

D) ovules

• question_answer164) Heterocysts are present in

A) Riccia

B) Ulothrix

C) Albugo

D) Nostoc

• question_answer165) In Albugo, sexual reproduction results in the formation of

A) zygospore

B) oospore

C) basidiospore

D) teliospore

• question_answer166) Double fertilization occurs in

A) Riccia

B) Pteridium

C) Cycas

D) Capsella

• question_answer167) Velamen is present in roots of

A) Vanda

B) Rhizophora

C) Asparagus

D) Maize

• question_answer168) In Ruscus, the stem is a

A) phyllode

C) offset

D) sucker

• question_answer169) In turmeric, stem is a

A) tuber

B) bulb

C) rhizome

D) corm

• question_answer170) Catkin inflorescence is found in

A) wheat

B) oat

C) mulberry

D) fig

• question_answer171) A racemose type of inflorescence with its main axis almost flat is called

A) corymb

B) umbel

C) spike

D) capitulum

• question_answer172) Epigynous flowers are present in

A) mustard

B) brinjal

C) China rose

D) cucumber

• question_answer173) A small, dry, one-seeded fruit with its pericarp fused with the seed-coat, developing from a monocarpellary gynoecium is called

A) cypsela

B) siliqua

C) caryopsis

D) samara

• question_answer174) Spathe is present in the flowers of

A) banana

B) rice

C) marigold

D) sunflower

• question_answer175) In Dianthus, placentation is

A) basal

B) free central

C) axile

D) marginal

• question_answer176) Ovary is half-inferior in the flower of

A) apple

B) guava

C) peach

D) garlic

• question_answer177) The term keel is used for special type of

A) sepals

B) petals

C) stamens

D) carpels

• question_answer178) Polyadelphous stamens are found in

A) cotton

B) sunflower

C) grain

D) lemon

• question_answer179) Replum is the characteristic feature of the ovary of

A) Asteraceae

B) Brassicaceae

C) Malvaceae

D) Liliaceae

• question_answer180) Coffee and quinine are obtained from the

A) Leguminosae

B) Asteraceae

C) Rubiaceae

D) Poaceae

• question_answer181) Which of the following includes largest number of genera and species of plants?

A) Brassicaceae

B) Liliaceae

C) Malvaceae

D) Asteraceae

• question_answer182) Flowers are zygomorphic in

A) mustard

C) lily

D) candytuft

• question_answer183) An old trunk of shisham (Dalbergia sissoo) tree would possess maximum amount of

A) primary xylem

B) secondary xylem

C) primary phloem

D) secondary cortex

• question_answer184) Vascular bundles are arranged in a ring in stem of

A) wheat

B) rice

C) gram

D) maize

• question_answer185) Kranz anatomy can be observed in leaves of

A) sorghum

B) spinach

C) mustard

D) tulip

• question_answer186) In higher plants, transport of food material occurs through

A) companion cells

B) sieve elements

C) tracheids

D) transfusion tissue

• question_answer187) The term bark refers to

A) phellem, phelloderm and vascular cambium

B) periderm and secondary xylem

C) cork cambium and cork

D) phellogen, phellem, phelloderm and secondary phloem

• question_answer188) In angiosperms, female gametophyte is represented by

A) ovule

B) nucellus

C) megaspore mother cell

D) embryo sac

• question_answer189) The transfer of pollen grains from the anther to the stigma of another flower of the same plant is called

A) geitonogamy

B) autogamy

C) karyogamy

D) xenogamy

• question_answer190) Development of embryo from nucellar cell is common in many varieties of

A) citrus

B) sunflower

C) oat

D) marigold

• question_answer191) Endosperm is not completely consumed during embryo development in seeds of

A) gram

B) pea

C) bean

D) castor

• question_answer192) Developing pollen grains in microsporangium get their nourishment from

A) epidermis

B) endothecium

C) middle layer

D) tapetum

• question_answer193) Light reaction in stroma lamellae of the chloroplast results in the formation of

A) $NADP{{H}_{2}}$

B) $ATP+NADP{{H}_{2}}$

C) ATP

D) ${{O}_{2}}$

• question_answer194) One of the commonly used plant growth hormone in tea plantations is

A) ABA

B) zeatin

C) ${{I}_{AA}}$

D) ethylene

• question_answer195) Leghaemoglobin in root nodules of legumes

A) protects nitrogenase

B) converts ${{N}_{3}}$ to $N{{H}_{3}}$

C) oxidizes $N{{O}_{2}}$ to $N{{O}_{3}}$

D) helps in development of infection threads

• question_answer196) The chief sinks for the mineral elements are

A) senescent leaves

B) ripe fruits

C) lateral meristems

D) bark

• question_answer197) In leaves of ${{C}_{4}}$ plants malic acid synthesis during $C{{O}_{2}}$ fixation occurs in

A) bundle sheath

B) mesophyll

C) epidermis

D) guard cells

• question_answer198) Which of the following helps in maintenance of cell shape

A) plasmalemma

B) endoplasmic reticulum

C) cytoskeleton

D) mesosome

• question_answer199) Membrane is absent in

A) nucleus

B) nucleolus

C) vacuole

D) lysosome

• question_answer200) A suitable vector gene cloning in higher

A) organisms is

B) baculovirus

C) retrovirus

D) Salmonella typhimurium Neurospora crassa