# Solved papers for NEET NEET SOLVED PAPER 2016

### done NEET SOLVED PAPER 2016

• question_answer1) From a disc of radius R and mass M, a circular hole of diameter R, whose rim passes through the centre is cut. What is the moment of inertia of the remaining part of the disc about a perpendicular axis, passing through the centre?

A) $15\,M{{R}^{2}}/32$

B) $13\,M{{R}^{2}}/32$

C) $11\,M{{R}^{2}}/32$

D) $9\,M{{R}^{2}}/32$

• question_answer2) A square loop ABCD carrying a current i, is placed near and coplanar with a long straight conductor XY carrying a current I, the net force on the loop will be :-

A) $\frac{2{{\mu }_{0}}li}{3\pi }$

B) $\frac{{{\mu }_{0}}li}{2\pi }$

C) $\frac{2{{\mu }_{0}}liL}{3\pi }$

D) $\frac{{{\mu }_{0}}liL}{2\pi }$

• question_answer3) The magnetic susceptibility is negative for :

A) diamagnetic material only

B) paramagnetic material only

C) ferromagnetic material only

D) paramagnetic and ferromagnetic materials

• question_answer4) A siren emitting a sound of frequency 800 Hz moves away from an observer towards a cliff at a speed of $\text{15m}{{\text{s}}^{-1}}$. Then, the frequency of sound that the observer hears in the echo reflected from the cliff is: (Take velocity of sound in air$=330\text{m}{{\text{s}}^{-1}}$)

A) 765 Hz

B) 800 Hz

C) 838 Hz

D) 885 Hz

• question_answer5) A capacitor of 2μF is charged as shown in the diagram. When the switch S is turned to position 2, the percentage of its stored energy dissipated is:

A) 0%

B) 20%

C) 75%

D) 80%

• question_answer6) In a diffraction pattern due to a single slit of width 'a', the first minimum is observed at an angle ${{30}^{o}}$ when light of wavelength $5000\text{ }\overset{o}{\mathop{\text{A}}}\,$ is incident on the slit. The first secondary maximum is observed at an angle of :

A) ${{\sin }^{-1}}\left( \frac{1}{4} \right)$

B) ${{\sin }^{-1}}\left( \frac{2}{3} \right)$

C) ${{\sin }^{-1}}\left( \frac{1}{2} \right)$

D) ${{\sin }^{-1}}\left( \frac{3}{4} \right)$

• question_answer7) At what height from the surface of earth the gravitation potential and the value of g are $5.4\text{ }\times \text{ }{{10}^{7}}\text{ J k}{{\text{g}}^{2}}$ and $6.0\text{ m}{{\text{s}}^{2}}$ respectively? Take the radius of earth as 6400 km:

A) 2600 km

B) 1600 km

C) 1400 km

D) 2000 km

• question_answer8) Out of the following options which one can be used to produce a propagating electromagnetic wave?

A) A charge moving at constant velocity

B) A stationary charge

C) A chargeless particle

D) An accelerating charge

• question_answer9) Two identical charged spheres suspended from a common point by two massless strings of lengths $l,$are initially at a distance $d\,(d<<l)$apart because of their mutual repulsion. The charges begin to leak from both the spheres at a constant rate. As a result, the spheres approach each other with a velocity v. Then v varies as a function of the distance x between the spheres, as:

A) $v\propto {{x}^{\frac{1}{2}}}$

B) $v\propto x$

C) $v\propto {{x}^{-\frac{1}{2}}}$

D) $v\propto {{x}^{-1}}$

• question_answer10) A uniform rope of length L and mass m1 hangs vertically from a rigid support. A block of mass ${{m}_{2}}$is attached to the free end of the rope. A transverse pulse of wavelength ${{\lambda }_{1}}$ is produced at the lower end of the rope. The wavelength of the pulse when it reaches the top of the rope is ${{\lambda }_{2}}.$ The ratio ${{\lambda }_{2}}/{{\lambda }_{1}}$ is :

A) $\sqrt{\frac{{{m}_{1}}}{{{m}_{2}}}}$

B) $\sqrt{\frac{{{m}_{1}}+{{m}_{2}}}{{{m}_{2}}}}$

C) $\sqrt{\frac{{{m}_{2}}}{{{m}_{1}}}}$

D) $\sqrt{\frac{{{m}_{1}}+{{m}_{2}}}{{{m}_{1}}}}$

• question_answer11) A refrigerator works between $4{{\,}^{o}}C$ and $30{{\,}^{o}}C.$ It is required to remove 600 calories of heat every second in order to keep the temperature of the refrigerated space constant. The power required is: (Take 1 cal = 4.2 Joules)

A) 2.365 W

B) 23.65 W

C) 236.5 W

D) 2365 W

• question_answer12) An air column, closed at one end and open at the other, resonates with a tuning fork when the smallest length of the column is 50 cm. The next larger length of the column resonating with the same tuning fork is:

A) 66.7 cm

B) 100 cm

C) 150 cm

D) 200 cm

• question_answer13) Consider the junction diode as ideal. The value of current flowing through AB is :

A) $0\,A$

B) ${{10}^{-2}}A$

C) ${{10}^{-1}}A$

D) ${{10}^{-3}}A$

• question_answer14) The charge flowing through a resistance R varies with time t as $Q=at-b{{t}^{2}},$ where a and b are positive constants. The total heat produced in R is:

A) $\frac{{{a}^{3}}R}{6b}$

B) $\frac{{{a}^{3}}R}{3b}$

C) $\frac{{{a}^{3}}R}{2b}$

D) $\frac{{{a}^{3}}R}{b}$

• question_answer15) A black body is at a temperature of 5760 K. The energy of radiation emitted by the body at wavelength 250 nm is${{\text{U}}_{\text{1}}}\text{,}$ at wavelength 500 nm is ${{\text{U}}_{2}}$ and that at 1000 nm is ${{\text{U}}_{3}}.$ Wien's constant, $\text{b = 2}\text{.88 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{6}}}\text{ nmK}\text{.}$Which of the following is correct?

A) ${{\text{U}}_{1}}=0$

B) ${{\text{U}}_{3}}=0$

C) ${{\text{U}}_{\text{1}}}\text{ }{{\text{U}}_{\text{2}}}$

D) ${{\text{U}}_{2}}\text{ }{{\text{U}}_{1}}$

• question_answer16) Coefficient of linear expansion of brass and steel rods are ${{\alpha }_{1}}$ and ${{\alpha }_{2}}.$ Lengths of brass and steel rods are ${{\ell }_{1}}$and ${{\ell }_{.2}}$ respectively. If $({{\ell }_{2}}-{{\ell }_{1}})$is maintained same at all temperatures, which one of the following relations holds good?

A) ${{\alpha }_{1}}{{\ell }_{2}}={{\alpha }_{2}}{{\ell }_{1}}$

B) ${{\alpha }_{1}}\ell _{2}^{2}={{\alpha }_{2}}\ell _{1}^{2}$

C) $\alpha _{1}^{2}{{\ell }_{2}}=\alpha _{2}^{2}{{\ell }_{1}}$

D) ${{\alpha }_{1}}{{\ell }_{1}}={{\alpha }_{2}}{{\ell }_{2}}$

• question_answer17) A npn transistor is connected in common emitter configuration in a given amplifier. A load resistance of $800\,\Omega$is connected in the collector circuit and the voltage drop across it is 0.8 V. If the current amplification factor is 0.96 and the input resistance of the circuit is $192\Omega ,$the voltage gain and the power gain of the amplifier will respectively be :

A) 4, 3.84

B) 3.69, 3.84

C) 4, 4

D) 4, 3.69

• question_answer18) The intensity at the maximum in a Young's double slit experiment is ${{\text{I}}_{\text{0}}}\text{.}$Distance between two slits is $d=5\lambda ,$where $\lambda$the wavelength of light is used in the experiment. What will be the intensity in front of one of the slits on the screen placed at a distance D = 10 d?

A) ${{I}_{0}}$

B) $\frac{{{I}_{0}}}{4}$

C) $\frac{3}{4}{{I}_{0}}$

D) v

• question_answer19) A uniform circular disc of radius 50 cm at rest is free to turn about an axis which is perpendicular to its plane and passes through its centre. It is subjected to a torque which produces a constant angular acceleration of $\text{2}\text{.0 rad }{{\text{s}}^{-2}}.$ Its net acceleration in $\text{m}{{\text{s}}^{-2}}$at the end of 2.0 s is approximately :

A) 8.0

B) 7.0

C) 6.0

D) 3.0

• question_answer20) An electron of mass m and a photon have same energy E. The ratio of de-Broglie wavelengths associated with them is :

A) $\frac{1}{c}{{\left( \frac{E}{2m} \right)}^{\frac{1}{2}}}$

B) ${{\left( \frac{E}{2m} \right)}^{\frac{1}{2}}}$

C) $c{{\left( 2mE \right)}^{\frac{1}{2}}}$

D) $\frac{1}{xc}{{\left( \frac{2m}{E} \right)}^{\frac{1}{2}}}$ (being velocity of light)

• question_answer21) A disk and a sphere of same radius but different masses roll off on two inclined planes of the same altitude and length. Which one of the two objects gets to the bottom of the plane first?

A) Disk

B) Sphere

C) Both reach at the same time

D) Depends on their masses

• question_answer22) The angle of incidence for a ray of light at a refracting surface of a prism is $\text{4}{{\text{5}}^{\text{o}}}\text{.}$The angle of prism is $\text{6}{{\text{0}}^{\text{o}}}\text{.}$ If the ray suffers minimum deviation through the prism, the angle of minimum deviation and refractive index of the material of the prism respectively, are :

A) $\text{4}{{\text{5}}^{\text{o}}}\text{,}\,\frac{1}{\sqrt{2}}$

B) ${{30}^{\text{o}}}\text{,}\,\sqrt{2}$

C) ${{45}^{\text{o}}}\text{,}\,\sqrt{2}$

D) ${{30}^{\text{o}}}\text{,}\,\frac{1}{\sqrt{2}}$

• question_answer23) When an $\alpha -$particle of mass 'm' moving with velocity 'v' bombards on a heavy nucleus of charge 'Ze', its distance of closest approach from the nucleus depends on m as :

A) $\frac{1}{m}$

B) $\frac{1}{\sqrt{m}}$

C) $\frac{1}{{{m}^{2}}}$

D) m

• question_answer24) A particle of mass 10 g moves along a circle of radius 6.4 cm with a constant tang entail acceleration. What is the magnitude of this acceleration if the kinetic energy of the particle becomes equal to $8\times {{10}^{4}}\text{ J}$ by the end of the second revolution after the beginning of the motion?

A) $0.1\text{ }m/{{s}^{2}}$

B) $0.15\text{ }m/{{s}^{2}}$

C) $0.18\text{ }m/{{s}^{2}}$

D) $0.2\text{ }m/{{s}^{2}}$

• question_answer25) The molecules o f a given mass o f a gas have r.m.s. velocity of $\text{200}\,\text{m}{{\text{s}}^{-1}}$ at $27{{\,}^{o}}C$and $1.0\times {{10}^{5}}\,\text{N}{{\text{m}}^{-2}}$ pressure. When the temperature and pressure of the gas are respectively, $\text{127}{{\,}^{\text{o}}}\text{C}$and$\text{0}\text{.05}\times {{10}^{5}}\,\text{N}{{\text{m}}^{-2}},$ the r. m. s. velocity of its molecules in $\text{m}{{\text{s}}^{1}}$is :

A) $100\sqrt{2}$

B) $\frac{400}{\sqrt{3}}$

C) $\frac{100\sqrt{2}}{3}$

D) $\frac{100}{3}$

• question_answer26) A long straight wire of radius a carries a steady current $\text{I}\text{.}$The current is uniformly distributed over its cross-section. The ratio of the magnetic fields B and B', at radial distances $\frac{a}{2}$and 2a respectively, from the axis of the wire is :

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

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

C) 1

D) 4

• question_answer27) A particle moves so that its position vector is given by $\overrightarrow{r}=\cos \,\omega \text{ }t\,\widehat{x}+\sin \,\omega \,t\,\widehat{y}.$ Where $\omega$ is a constant.  Which of the following is true?

A)  Velocity and acceleration both are perpendicular to r $\vec{r}.$

B)  Velocity and acceleration both are parallel to $\vec{r}.$

C)   Velocity is perpendicular to $\vec{r}.$and acceleration is directed towards the origin

D)   Velocity is perpendicular to $\vec{r}.$and acceleration is directed away from the origin

• question_answer28) What is the minimum velocity with which a body of mass m must enter a vertical loop of radius R so that it can complete the loop?

A) $\sqrt{gR}$

B) $\sqrt{2gR}$

C) $\sqrt{3gR}$

D) $\sqrt{5gR}$

• question_answer29) When a metallic surface is illuminated with radiation of wavelength $\lambda ,$ the stopping potential is V. If the same surface is illuminated with radiation of wavelength $2\lambda ,$ the stopping potential is $\frac{V}{4}.$ The threshold wavelength for the metallic surface is :-

A) $4\lambda$

B) $5\lambda$

C) $\frac{5}{2}\lambda$

D) $3\lambda$

• question_answer30) A gas is compressed isothermally to half its initial volume. The same gas is compressed separately through an adiabatic process until its volume is again reduced to half. Then :-

A) Compressing the gas isothermally will require more work to be done.

B) Compressing the gas through adiabatic process will require more work to be done.

C) Compressing the gas isothermally or adiabatically will require the same amount of work.

D) Which of the case (whether compression through isothermal or through adiabatic process) requires more work will depend upon the atomicity of the gas.

• question_answer31) A potentiometer wire is 100 cm long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at 50 cm and 10 cm from the positive end of the wire in the two cases. The ratio of emf's is :-

A) 5 : 1

B) 5 : 4

C) 3 : 4

D) 3 : 2

• question_answer32) A astronomical telescope has objective and eyepiece of focal lengths 40 cm and 4 cm respectively. To view an object 200 cm away from the objective, the lenses must be separated by a distance :-

A) 37.3 cm

B) 46.0 cm

C) 50.0 cm

D) 54.0 cm

• question_answer33) Two non-mixing liquids of densities $\rho$ and$n\rho (n>1)$ are put in a container. The height of each liquid is h. A solid cylinder of length L and density d is put in this container. The cylinder floats with its axis vertical and length $pL(p<1)$in the denser liquid. The density d is equal to :-

A) $\{1+(n+1)p\}\rho$

B) $\{2+(n+1)p\}\rho$

C) $\{2+(n-1)p\}\rho$

D) $\{1+(n-1)p\}\rho$

• question_answer34) To get output 1 for the following circuit, the correct choice for the input is

A) A = 0, B = 1, C = 0

B) A = 1, B = 0, C = 0

C) A = 1, B = 1, C = 0

D) A = 1, B = 0, C = 1

• question_answer35) A piece of ice falls from a height h so that it melts completely. Only one-quarter of the heat produced is absorbed by the ice and all energy of ice gets converted into heat during its fall. The value of h is : [Latent heat of ice is $\text{3}\text{.4 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{5}}}\text{ J/kg}$and g = 10 N/kg]

A) 34 km

B) 544 km

C) 136 km

D) 68 km

• question_answer36) The ratio of escape velocity at earth $({{v}_{e}})$ to the escape velocity at a planet $({{v}_{p}})$ whose radius and mean density are twice as that of earth is :-

A) 1 : 2

B) $1:2\sqrt{2}$

C) 1 : 4

D) $1:\sqrt{2}$

• question_answer37) If the magnitude of sum of two vectors is equal to the magnitude of difference of the two vectors, the angle between these vectors is :-

A) ${{0}^{o}}$

B) ${{90}^{o}}$

C) ${{45}^{o}}$

D) ${{180}^{o}}$

• question_answer38) Given the value of Rydberg constant is ${{10}^{7}}{{\text{m}}^{-1}},$ the wave number of the last line of the Balmer series in hydrogen spectrum will be :-

A) $0.025\text{ }\times \text{ }{{10}^{4}}\text{ }{{m}^{1}}$

B) $0.5\text{ }\times \text{ }{{10}^{7}}\text{ }{{m}^{1}}$

C) $0.25\text{ }\times \text{ }{{10}^{7}}\text{ }{{m}^{1}}$

D) $2.5\text{ }\times \text{ }{{10}^{7}}\text{ }{{m}^{1}}$

• question_answer39) A body of mass 1 kg begins to move under the action of a time dependent force $\vec{F}=(2t\,\hat{i}\,+3{{t}^{2}}\hat{j})N,$where$\hat{i}$ and $\hat{j}$are unit vectors along x and y axis. What power will be developed by the force at the time t?

A) $(2{{t}^{2}}+3{{t}^{3}})W$

B) $(2{{t}^{2}}+4{{t}^{4}})W$

C) $(2{{t}^{3}}+3{{t}^{4}})W$

D) $(2{{t}^{3}}+3{{t}^{5}})W$

• question_answer40) An inductor 20 mH, a capacitor $50\mu F$ and a resistor $\text{40}\,\Omega$ are connected in series across a source of emf V = 10 sin 340 t. The power loss in A.C. circuit is :-

A) 0.51 W

B) 0.67 W

C) 0.76 W

D) 0.89 W

• question_answer41) If the velocity of a particle is $v=At=B{{t}^{2}},$ where A and B are constants, then the distance travelled by it between 1s and 2s is :-

A) $\frac{3}{2}A+4B$

B) $3A+7B$

C) $\frac{3}{2}A+\frac{7}{3}B$

D) $\frac{A}{2}+\frac{B}{3}$

• question_answer42) A long solenoid has 1000 turns. When a current of 4A flows through it, the magnetic flux linked with each turn of the solenoid is $4\times {{10}^{-3}}\,\text{Wb}\text{.}$ The self-inductance of the solenoid is :-

A) 4H

B) 3H

C) 2H

D) 1H

• question_answer43) A small signal voltage $\text{V(t) = }{{\text{V}}_{\text{0}}}\,\sin \omega t$ is applied across an ideal capacitor C :-

A) Current $\text{I(t),}$ lags voltage V(t) by $\text{9}{{\text{0}}^{o}}.$

B) Over a full cycle the capacitor C does not consume any energy from the voltage source.

C) Current$\text{I(t)}$ is in phase with voltage V(t).

D) Current $\text{I(t)}$leads voltage V(t) by $\text{18}{{\text{0}}^{o}}.$

• question_answer44) Match the corresponding entries of column-1 with coloumn-2 (Where m is the magnification produced by the mirror) :-

 Column-I Column-II A. $m = - 2$ a. Convex mirror B. $m=-\frac{1}{2}$ b. Concave mirror C. $m = + 2$ c. Real image D. $m=+\frac{1}{2}$ d. Virtual image

A) A $\to$ b and c, B $\to$ b and c, C $\to$b and d, D $\to$ a and d.

B) A $\to$ a and c, B $\to$ a and d, C $\to$ a and b, D $\to$ c and d

C) A $\to$ a and d, B $\to$ b and c, C$\to$ b and d, D $\to$ b and c

D) A $\to$ c and d, B $\to$ b and d, C $\to$ b and c, D $\to$ a and d

• question_answer45) A car is negotiating a curved road of radius R. The road is banked at an angle $\theta .$ the coefficient of friction between the tyres of the car and the road is ${{\mu }_{s}}.$The maximum safe velocity on this road is :-

A) $\sqrt{g{{R}^{2}}\frac{{{u}_{s}}+\tan \theta }{1-{{\mu }_{s}}\tan \theta }}$

B) $\sqrt{gR\frac{{{u}_{s}}+\tan \theta }{1-{{\mu }_{s}}\tan \theta }}$

C) $\sqrt{\frac{g}{R}\frac{{{u}_{s}}+\tan \theta }{1-{{\mu }_{s}}\tan \theta }}$

D) $\sqrt{\frac{g}{{{R}^{2}}}\frac{{{u}_{s}}+\tan \theta }{1-{{\mu }_{s}}\tan \theta }}$

• question_answer46) Consider the molecules $\text{C}{{\text{H}}_{\text{4}}}\text{,N}{{\text{H}}_{\text{3}}}$and ${{\text{H}}_{\text{2}}}\text{O}\text{.}$Which of the given statements is false?

A) The H -C-H bond angle in $C{{H}_{4}},$the H-N- bond angle in $\text{N}{{\text{H}}_{\text{3}}}\text{,}$and the H-O-H bond angle in ${{\text{H}}_{\text{2}}}\text{O}$ar all greater than $\text{9}{{\text{0}}^{o}}$

B) The H-O-H bond angle in ${{\text{H}}_{\text{2}}}\text{O}$is larger than the H-C-H bond angle in $\text{C}{{\text{H}}_{\text{4}}}.$

C) The H-O-H bond angle in ${{\text{H}}_{\text{2}}}\text{O}$is smaller than the H-N-H bond angle in $\text{N}{{\text{H}}_{\text{3}}}\text{.}$

D) The H-C-H bond angle in $\text{C}{{\text{H}}_{4}}$is larger than the H-N-H bond angle in $\text{N}{{\text{H}}_{\text{3}}}\text{.}$

• question_answer47) In the reaction $H-C\equiv CH\frac{(1)NaN{{H}_{2}}/liq.N{{H}_{3}}}{(2)C{{H}_{3}}C{{H}_{2}}Br}X\frac{(1)NaN{{H}_{2}}/liq.N{{H}_{3}}}{(2)C{{H}_{3}}C{{H}_{2}}Br}Y$X and Y are:

A) X = 1-Butyne; Y = 3-Hexyne

B) X = 2-Butyne; Y = 3-Hexyne

C) X = 2-Butyne; Y = 2-Hexyne

D) X = 1-Butyne; Y = 2-Hexyne

• question_answer48) Among the following, the correct order of acidity is

A) $HCl{{O}_{3}}\text{ }<\text{ }HCl{{O}_{4}}\text{ }<\text{ }HCl{{O}_{2}}\text{ }<\text{ }HClO$

B) $~HClO\text{ }<\text{ }HCl{{O}_{2}}\text{ }<\text{ }HCl{{O}_{3}}\text{ }<\text{ }HCl{{O}_{4}}$

C) $HCl{{O}_{2}}\text{ }<\text{ }HClO\text{ }<\text{ }HCl{{O}_{3}}\text{ }<\text{ }HCl{{O}_{4}}$

D) $HCl{{O}_{4}}\text{ }<\text{ }HCl{{O}_{2\text{ }}}<\text{ }HClO\text{ }<\text{ }HCl{{O}_{3}}$

• question_answer49) The rat e of a first -order react ion is $\text{0}\text{.04}\,\text{mol}\,{{\ell }^{-1}}{{s}^{-1}}$at 10 seconds and $0.03\,\text{mol }{{\ell }^{-1}}{{s}^{-1}}$at 20 seconds after initiation of the reaction. The half-life period of the reaction is:

A) 24.1 s

B) 34.1 s

C) 44.1 s

D) 54.1 s

• question_answer50) Which one of the following characteristics is associated with adsorption?

A) $\Delta G$is negative but $\Delta H$and $\Delta S$are positive

B) $\Delta G,\Delta H$and $\Delta S$all are negative

C) $\Delta G$ and $\Delta H$are negative but$\Delta S$ is positive

D) $\Delta G$ and $\Delta S$ are negative but $\Delta H$is positive

• question_answer51) In which of the following options the order of arrangement does not agree with the variation of property indicated against it?

A) $A{{l}^{3+}}<M{{g}^{2+}}<N{{a}^{+}}<{{F}^{-}}$ (increasing ionic size)

B) B < C < N < O (increasing first ionisation enthalpy)

C) $I\text{ }<\text{ }Br\text{ }<\text{ }Cl\text{ }<\text{ }F$ (increasing electron gain enthalpy)

D) $Li\text{ }<\text{ }Na\text{ }<\text{ }K\text{ }<\text{ }Rb$ (increasing metallic radius)

• question_answer52) Which of the following statements is false?

A) $\text{M}{{\text{g}}^{\text{2+}}}$ions form a complex with ATP

B) $\text{C}{{\text{a}}^{\text{2+}}}$ions are important in blood clotting

C) $\text{C}{{\text{a}}^{\text{2+}}}$ions are not important in maintaining the regular beating of the heart.

D) $\text{M}{{\text{g}}^{\text{2+}}}$ions are important in the green parts of plants.

A) hydrogen has three isotopes of which tritium is the most common.

B) Hydrogen never acts as cation in ionic salts

C) Hydronium ion, ${{\text{H}}_{\text{3}}}{{\text{O}}^{\text{+}}}$exists freely in solution

D) Dihydrogen does not act as a reducing agent

• question_answer54) The correct statement regarding a carbonyl compound with a hydrogen atom on its alpha carbon, is :-

A) a carbonyl compound with a hydrogen atom on its alpha-carbon never equilibrates with its corresponding enol.

B) a carbonyl compound with a hydrgen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as aldehyde-ketone equilibration.

C) a carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as carbonylation.

D) a carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as keto-enol tautomerism.

• question_answer55) MY and $\text{N}{{\text{Y}}_{3}},$two nearly insoluble salts, have the same ${{K}_{sp}}$values of $6.2\text{ }\times \text{ }{{10}^{13}}$ at room temperature. Which statement would be true in regard to MY and$\text{N}{{\text{Y}}_{3}}$?

A) The molar solubilities of MY and $\text{N}{{\text{Y}}_{\text{3}}}$in water are identical.

B) The molar solubility of MY in water is less than that of $\text{N}{{\text{Y}}_{\text{3}}}$

C) The salts MY and $\text{N}{{\text{Y}}_{\text{3}}}$are more soluble in 0.5 M KY than in pure water.

D) The addition of the salt of KY to solution of MY and $\text{N}{{\text{Y}}_{\text{3}}}$will have no effect on their solubilities.

• question_answer56) In a protein molecule various amino acids are linked together by:

A) $\alpha -$ glycosidic bond

B) $\beta -$glycosidic bond

C) peptide bond

D) dative bond

A) All cis-configuration

B) All trans-configuration

C) Alternate cis-and trans-configuration

D) Random cis-and trans-configuration

• question_answer58) Match items of Column I with the items of Column II and asign the correct code :

 Column - I Column - II (A) Cyanide process (I) Ultrapure Ge (B) Froth floatation process (II) Dressing of ZnS (C) Electrolytic reduction (III) Extraction of Al (A) Zone refining (iv) Extraction of Au (v) Purification of Ni
Code:

A) (A)-(iv) (B)-(ii) (C)-(iii) (D)-(i)

B) (A)-(ii) (B)-(iii) (C)-(i) (D)-(v)

C) (A)-(i) (B)-(ii) (C)-(iii) (D)-(iv)

D) (A)-(iii) (B)-(iv) (C)-(v) (D)-(i)

• question_answer59) Which one of the following statements is correct when $\text{S}{{\text{O}}_{\text{2}}}$is passed through acidified ${{\text{K}}_{2}}C{{r}_{2}}{{O}_{7}}$solution?

A) The solution turns blue

B) The solution is decolourized

C) $\text{S}{{\text{O}}_{\text{2}}}$is reduced

D) Green $C{{r}_{2}}{{(S{{O}_{4}})}_{3}}$is formed

• question_answer60) The electronic configurations of Eu(Atomic No 63), Gd(Atomic No 64) and Tb (Atomic No. 65) are

A) $[Xe]4{{f}^{7}}6{{s}^{2}},\text{ }\!\![\!\!\text{ }Xe\text{ }\!\!]\!\!\text{ }4{{f}^{8}}\text{ }6{{s}^{2}}$and $[Xe]4{{f}^{8}}5{{d}^{1}}6{{s}^{2}}$

B) $[Xe]4{{f}^{7}}5{{d}^{1}}6{{s}^{2}},\text{ }\!\![\!\!\text{ }Xe\text{ }\!\!]\!\!\text{ }4{{f}^{7}}\text{ }5{{d}^{1}}\text{ }6{{s}^{2}}$and $[Xe]4{{f}^{9}}6{{s}^{2}}$

C) $[Xe]4{{f}^{6}}5{{d}^{1}}6{{s}^{2}},\text{ }\!\![\!\!\text{ }Xe\text{ }\!\!]\!\!\text{ }4{{f}^{7}}5d16{{s}^{2}}$and $[Xe]4{{f}^{8}}5{{d}^{1}}6{{s}^{2}}$

D) $[Xe]4{{f}^{7}}6{{s}^{2}},\text{ }\!\![\!\!\text{ }Xe\text{ }\!\!]\!\!\text{ }4{{f}^{7}}5{{d}^{1}}6{{s}^{2}}$and $[Xe]4{{f}^{9}}6{{s}^{2}}$

• question_answer61) Two electrons occupying the same orbital are distinguished by

A) Principal quantum number

B) Magnetic quantum number

C) Azimuthal quantum number

D) Spin quantum number

• question_answer62) Which copper is heated with conc. $\text{HN}{{\text{O}}_{\text{3}}}$ it produces

A) $\text{Cu}{{\left( \text{N}{{\text{O}}_{\text{3}}} \right)}_{\text{2}}}$and $\text{N}{{\text{O}}_{\text{2}}}$

B) $\text{Cu}{{\left( \text{N}{{\text{O}}_{\text{3}}} \right)}_{\text{2}}}$ and NO

C) $\text{Cu}{{\left( \text{N}{{\text{O}}_{\text{3}}} \right)}_{\text{2}}},$NO and $\text{N}{{\text{O}}_{\text{2}}}$

D) $\text{Cu}{{\left( \text{N}{{\text{O}}_{\text{3}}} \right)}_{\text{2}}}$and $\text{N}{{\text{O}}_{\text{2}}}$

• question_answer63) Which of the following reagents would distinguish cis-cyclopenta-1,2-diol from the trans-isomer?

A) Acetone

B) Ozone

C) $\text{Mn}{{\text{O}}_{\text{2}}}$

D) Aluminium isopropxide

• question_answer64) The correct thermodynamic conditions for the spontaneous reaction at all temperatures is

A) $\Delta H<0$and $\Delta S=0$

B) $\Delta H>0$and $\Delta S<0$

C) $\Delta H<0$and $\Delta S>0$

D) $\Delta H<0$and $\Delta S<0$

• question_answer65) Lithium has a bcc structure. Its density is $530\,\text{kg}\,{{\text{m}}^{-3}}$ and its atomic mass is $6.94\text{ g mo}{{\text{l}}^{1~}}$Calculate the edge length of a unit cell of Lithium metal. $({{N}_{A}}=\text{ }6.02\text{ }\times \text{ }{{10}^{23}}\text{ mo}{{\text{l}}^{1}})$

A) 154 pm

B) 352 pm

C) 527 pm

D) 264 pm

• question_answer66) Which one of the following orders is correct for the bond dissociation enthalpy of halogen molecules?

A) ${{I}_{2}}>\text{ }B{{r}_{2}}>\text{ }C{{l}_{2}}>{{F}_{2}}$

B) $C{{l}_{2}}>\text{ }B{{r}_{2}}>\text{ }{{F}_{2}}>\text{ }{{I}_{2}}$

C) $B{{r}_{2}}>\text{ }{{I}_{2}}>\text{ }{{F}_{2}}>\text{ }C{{l}_{2}}$

D) ${{F}_{2}}>\text{ }C{{l}_{2}}>\text{ }B{{r}_{2}}>\text{ }{{I}_{2}}$

• question_answer67) Which of the following is an analgesic?

A) Novalgin

B) Penicillin

C) Streptomycin

D) Chloromycetin

• question_answer68) Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. What fraction of the oxygen escapes in the time required for one-half of the hydrogen to escape?

A) 1/8

B) 1/4

C) 3/8

D) 1/2

• question_answer69) Consider the nitration of benzene using mixed conc. ${{\text{H}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}$and $\text{HN}{{\text{O}}_{\text{3}}}\text{.}$If a large amount of $\text{KHS}{{\text{O}}_{\text{4}}}$is added to the mixture, the rate of nitration will be:-

A) faster

B) slower

C) unchanged

D) doubled

• question_answer70) Predict the correct order among the following:-

A) lone pair- lone pair > lone pair - bond pair bond pair - bond pair

B) lone pair - lone pair > bond pair - bond pair lone pair - bond pair

C) bond pair - bond pair > lone pair - bond pair lone pair - lone pair

D) lone pair - bond pair > bond pair - bond pair lone pair - lone pair

• question_answer71) The product obtained as a result of a reaction of nitrogen with $\text{Ca}{{\text{C}}_{\text{2}}}$ is :-

A) $Ca{{(CN)}_{2}}$

B) $CaCN$

C) $CaC{{N}_{3}}$

D) $C{{a}_{2}}CN$

• question_answer72) Consider the following liquid - vapour equilibrium. $\text{Liquid }\text{Vapour}$ Which of the following relations is correct?

A) $\frac{d\ell nG}{d{{T}^{2}}}=\frac{\Delta {{ }_{v}}}{R{{T}^{2}}}$

B)  $\frac{d\ell nP}{dT}=\frac{-\Delta {{ }_{v}}}{RT}$

C)   $\frac{d\ell nP}{d{{T}^{2}}}=\frac{-\Delta {{ }_{v}}}{{{T}^{2}}}$

D)   $\frac{d\ell nP}{dT}=\frac{\Delta {{ }_{v}}}{R{{T}^{2}}}$

• question_answer73) Match the compounds given in column I with the hybridisation and shape given in column II and mark the correct option.

 Column-I Column -II (A) $Xe{{F}_{6}}$ (i) Distorted octahedral (B) $Xe{{O}_{3}}$ (ii) Square planar (C) $XeO{{F}_{4}}$ (iii) Pyramidal (D) $Xe{{F}_{4}}$ (iv) Square pyramidal

A) (A)-(i) (B)-(iii) (C)- (iv) (D)-(ii)

B) (A)-(i) (B)-(ii) (C)- (iv) (D)-(iii)

C) (A)-(iv) (B)-(iii) (C)- (i) (D)-(ii)

D) (A)-(iv) (B)-(i) (C)- (ii) (D)-(iii)

• question_answer74) Which of the following has longest C-O bond length? (Free C-O bond length in Co is$1.128\overset{\text{o}}{\mathop{\text{A}}}\,$).

 Note:- Since metal atom is carrying maximum -ve charge therefore it would show maximum synergic bonding as sa resultant C-O bond length would be maximum.

A)  $Ni{{(CO)}_{4}}$

B)  ${{[Co{{(CO)}_{4}}]}^{\text{O}-}}$

C)  ${{[Fe{{(CO)}_{4}}]}^{2-}}$

D)   ${{[Mn{{(CO)}_{6}}]}^{+}}$

• question_answer75) The pressure of ${{\text{H}}_{\text{2}}}$required to make the potential of ${{\text{H}}_{\text{2}}}-$electrode zero in pure water at 298 K is :-

A) ${{10}^{14}}\text{ atm}$

B) ${{10}^{12}}\text{ atm}$

C) ${{10}^{-10}}\text{atm}$

D) ${{10}^{-4}}\text{atm}$

• question_answer76) The addition of a catalyst during a chemical reaction alters which of the following quantities?

A) Entropy

B) Internal energy

C) Enthalpy

D) Activation energy

• question_answer77) The ionic radii of ${{\text{A}}^{\text{+}}}$and ${{\text{B}}^{}}$ions are $0.98\text{ }\times \text{ }10{{}^{10}}\text{m}$and $1.81\text{ }\times \text{ }{{10}^{10}}\text{ m}.$ The coordination number of each ion in AB is :-

A) 6

B) 4

C) 8

D) 2

• question_answer78) Which is the correct statement for the given acids?

A) Phosphinic acid is a diprotic acid while phosphonic acid is a monoprotic acid

B) Phosphinic acid is a monoprotic acid while phosphonic acid is a diprotic acid

C) Both are triprotic acids

D) Both are diprotic acids

• question_answer79) Fog is colloidal solution of :-

A) Liquid in gas

B) Gas in liquid

C) Solid in gas

D) Gas in gas

• question_answer80) Which of the following statement about the composition of the vapour over an ideal a 1 : 1 molar mixture of benzene and toluene is correct? Assume that the temperature is constant at $\text{25}{{\,}^{\text{o}}}\text{C}\text{.}$ (Given : Vapour Pressure Data at $\text{25}{{\,}^{\text{o}}}\text{C,}$ benzene = 12.8 kPa, Toluene = 3.85 kPa)

A) The vapour will contain a higher percentage of benzene

B) The vapour will contain a higher percentage of toluene

C) The vapour will contain equal amounts of benezene and toluene

D) Not enough information is given to make a predication

• question_answer81) The correct statement regarding the comparison of staggered and eclipsed conformation of ethane, is :-

A) The staggered conformation of ethane is less stable than eclipsed conformation, because staggered conformation has torsional strain

B) The eclipsed conformation of ethane is more stable than staggered conformation, because eclipsed conformation has no torsional strain

C) The eclipsed conformation of ethane is more stable than staggered conformation even through the eclipsed conformation has torsional strain

D) The staggered conformation of ethane is more stable than eclipsed conformation, because staggered conformation has no torsional strain.

• question_answer82) The reaction Can be classified as:-

A) Williamson ether synthesis reaction

B) Alcohol formation reaction

C) Dehydration reaction

D) Williamson alcohol synthesis reaction

• question_answer83) The product formed by the reaction of an aldehyde with a primary amine is :-

A) Schiff base

B) Ketone

C) Carboxylic acid

D) Aromatic acid

• question_answer84) Which of the following biphenyls is optically active?

A)

B)

C)

D)

• question_answer85) For the following reactions:-

 A. $~C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}Br\text{ }+\text{ }KOH\to$ $C{{H}_{3}}CH=C{{H}_{2}}+KBr\text{ }+\text{ }{{H}_{2}}O$ B. C.
Which of the following statements is correct?

A) (A) and (b) are elimination reaction and (C) is addition reaction

B) (A) is elimination, (B) is substitution and (C) is addition reaction

C) (A) is elimination, (B) and (C) are substitution reactions

D) (A) is substitution, (B) and (C) are addition reaction

• question_answer86) At ${{100}^{o}}C$ the vapour pressure of a solution of 6.5g of a solute in 100 g water is 732 mm. If ${{K}_{b}}=0.52,$ the boiling point of this solution will be :-

A) ${{101}^{o}}C$

B) ${{100}^{o}}C$

C) ${{102}^{o}}C$

D) ${{103}^{o}}C$

• question_answer87) The correct statement regarding RNA and DNA, respectively is:

A) The sugar component in RNA is arabinose and the sugar component in DNA is 2'-deoxyribose.

B) The sugar component in RNA is ribose and the sugar component in DNA is 2'-deoxyribose.

C) The sugar component in RNA is arabinose

D) The sugar component in RNA is 2'-deoxyribose and the sugar component in DNA is arabinose.

• question_answer88) The correct statement regarding the basicity of aryl amines is :-

A) Aryl amines are generally less basic than alkyl amines because the nitrogen lone-pair electrons are delocalized by interaction with the aromatic ring electron system.

B) Arylamines are generally more basic than alkylamines because the nitrogen lone-pair electrons are not delocalized by interaction with the aromatic ring  electron system.

C) Arylamines are generally more basic than alkylamines because of aryl group.

D) Arylamines are generally more basic than alkylamines, because the nitrongen atom in arylamines is sp-hybridized.

• question_answer89) Which one given below is a non-reducing sugar?

A) Maltose

B) Lactose

C) Glucose

D) Sucrose

• question_answer90) The pair of electron in the given carbanion, $C{{H}_{3}}C\equiv {{C}^{\,\text{O-}}},$is present in which of the following orbitals?

A) 2p

B) $s{{p}^{3}}$

C) $s{{p}^{2}}$

D) sp