# Solved papers for MGIMS WARDHA MGIMS WARDHA Solved Paper-2013

### done MGIMS WARDHA Solved Paper-2013

• question_answer1) A step-up transformer has transformation ratio$3:2$. The voltage in the secondary coil, if the voltage in the primary is 30 V will be

A) 300V

B) 90V

C) 45V

D) 23V

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• question_answer2) In the inductive circuit given in the figure, the current rises after the switch is closed. At instant when the current is 15 mA, then potential difference across the inductor will be A) zero

B) 240 V

C) 180 V

D) 60 V

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• question_answer3) A convex lens makes a real image of 4 cm long on a screen when the lens is shifted to a new position without disturbing the object or the screen, we get a real image on the screen, which is 16 cm long, then the length of the object is

A) $g/4\text{ }cm$

B) 8 cm

C) $2g/3$

D) 2 cm

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• question_answer4) A man wants to slide down a rope. The breaking load for the rope is$\frac{2}{3}$rd of the weight of the man. With what minimum acceleration should fireman slide down?

A) $g/4$

B) $g/3$

C) $2g/3$

D) $g/6$

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• question_answer5) A glass marble projected horizontally from the top of a table falls of a distance x from the edge of the table. If h is the height of the table, then the velocity of projection is

A) $h\sqrt{\frac{g}{2x}}$

B) $x\sqrt{\frac{g}{2h}}$

C) $gxh$

D) $gx+h$

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• question_answer6) If$x=\frac{{{\varepsilon }_{0}}lV}{t},$where${{\varepsilon }_{0}}$is the permittivity of free space,$l$is length, V is potential difference and $t$is time. The dimensions of$x$are same as that of

A) charge

B) resistance

C) voltage

D) current

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• question_answer7) A body executes simple harmonic motion under the action of force${{F}_{1}}$with a time period $\frac{4}{5}$s. If the force is changed to${{F}_{2}}$it executes simple harmonic motion with time period$\frac{3}{5}$s. If both forces${{F}_{1}}$and${{F}_{2}}$act simultaneously in the same direction on the body, its time period will be

A) $\frac{12}{25}s$

B) $\frac{24}{25}s$

C) $\frac{35}{24}s$

D) $\frac{15}{12}s$

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• question_answer8) A balloon contains$500\text{ }{{m}^{3}}$of He at$27{}^\circ C$and 1 atmospheric pressure. The volume of He at $-3{}^\circ C$ and$0.5$ atmospheric pressure will be

A) $700{{m}^{3}}$

B) $900{{m}^{3}}$

C) $1000\,{{m}^{3}}$

D) $500{{m}^{3}}$

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• question_answer9) If the radius of the earth is reduced by 1% without changing its mass. The change in g will be

A) 2% decrease

B) 2% increases

C) 1% decrease

D) 1% increases

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• question_answer10) A Cannot engine works between temperature $72{}^\circ C$and$27{}^\circ C$. The efficiency of the engine is

A) 70%

B) 30%

C) 0%

D) 10%

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• question_answer11) A man measure time period of a pendulum (T) in stationary lift. If the lift moves upward with acceleration$g/4$, then new time period will be

A) $\sqrt{\frac{2}{5}}T$

B) $\sqrt{\frac{5}{2}}T$

C) $\frac{\sqrt{5}T}{2}$

D) $\frac{2T}{\sqrt{5}}$

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• question_answer12) A wire of radius r has resistance R. If it is stretched to a radius of$\frac{3r}{4}$. Its resistance becomes

A) $\frac{256R}{81}$

B) $\frac{81R}{256}$

C) $\frac{16R}{9}$

D) $\frac{9R}{16}$

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• question_answer13) An astronomical telescope has an objective of focal length 100 cm and magnifying power of the distance between the two lenses in normal adjustment will be

A) 106 cm

B) 102 cm

C) 92 cm

D) 78 cm

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• question_answer14) What is the area of the plate of a 3 F parallel plate capacitor, if the separation between the plates is 5 mm?

A) $12.981\times {{10}^{2}}{{m}^{2}}$

B) $9.281\times {{10}^{9}}{{m}^{2}}$

C) $1.69\times {{10}^{12}}{{m}^{2}}$

D) $4.529\times {{10}^{9}}{{m}^{2}}$

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• question_answer15) A magnetizing field of 1600 A/m produces a magnetic; flux$2.4\times {{10}^{-5}}$Wb in an iron bar of cross-sectional area$0.2\text{ }c{{m}^{2}}$. The susceptibility of an iron bar will be

A) 1788

B) 1192

C) 596

D) 298

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• question_answer16) If the earth field induction at a place is 0.36 gauss and the angle of dip is$60{}^\circ ,$the horizontal and vertical components of the field will be respectively

A) 0.18 gauss,$0.18\sqrt{3}$gauss

B) 0.98 gauss,$0.9\sqrt{2}$gauss

C) 1.08 gauss, and$1.08\sqrt{3}$gauss

D) 1.07 gauss,$0.11\sqrt{2}$gauss

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• question_answer17) If a and b are two vectors, then the value of$(a\times b)\times (a-b)$is

A) $2(b\times a)$

B) $-2(b\times a)$

C) $b\times a$

D) $a\times b$

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• question_answer18) A body of specific heat$0.2\text{ }kcal/kg{}^\circ C$is heated through$100{}^\circ C$. The percentage increase in its mass is

A) 9%

B) $9.3\times {{10}^{-11}}%$

C) 10%

D) None of these

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• question_answer19) Which of the following is not correct regarding the radio telescope?

A) It cannot work at night

B) It can detect a very faint radio signal

C) It can be operated even in cloudily weather

D) It is much cheaper than optical telescope

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• question_answer20) If the change in the value of g at a height h above the surface of the earth is the same as at a depth x below in surface, then

A) $x={{h}^{2}}$

B) $x=0.5h$

C) $x=2h$

D) $x=h$

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• question_answer21) The sun delivers${{10}^{4}}W/{{m}^{2}}$of electromagnetic flux to the earths surface. The total power that is incident on a roof of dimension $(10\times 10){{m}^{2}}$will be

A) ${{10}^{4}}W$

B) ${{10}^{5}}W$

C) ${{10}^{6}}W$

D) ${{10}^{7}}W$

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• question_answer22) The minimum energy to ionize an atom is the energy required to

A) add one electron to the atom

B) excite the atom from its ground state to its excited state

C) remove one outer most electron from the atom

D) remove one inner most electron from the atom

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• question_answer23) The distance between two point objects P and Q is 32 cm. A convex lens of focal length 15 cm is placed between them, so that the images of both the objects are formed at the same place. The distance of$P$from the lens could be

A) 20 cm

B) 12 cm

C) 18 cm

D) 28 cm

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• question_answer24) To get an output$Y=1$from circuit of figure, the input must be A) A-0 B-1 C-0

B) A-0 B-0 C-1

C) A-1 B-0 C-0

D) A-1 B-0 C-1

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• question_answer25) X-rays are not used for radar purposes because they are not

A) reflected by target

B) partly absorbed by target

C) electromagnetic waves

D) completely absorbed by target

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• question_answer26) If$E=at+b{{t}^{2}},$ what is the neutral temperature?

A) $-\frac{a}{2b}$

B) $+\frac{a}{2b}$

C) $-\frac{a}{b}$

D) $+\frac{a}{b}$

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• question_answer27) An$8\mu F$capacitor is connected across 200 V, 50Hz line. What is the peak value of the charge through capacitor?

A) $2.5\times {{10}^{-3}}C$

B) $2.5\times {{10}^{-4}}C$

C) $5\times {{10}^{-5}}C$

D) $7.5\times {{10}^{-2}}C$

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• question_answer28) Copper has face centered cubic (fcc) lattice with interatomic spacing equals to$2.54\text{ }\overset{o}{\mathop{\text{A}}}\,$. The value of lattice constant for this lattice is

A) $\text{3}\text{.59}\overset{o}{\mathop{\text{A}}}\,$

B) $2.54\overset{o}{\mathop{\text{A}}}\,$

C) $1.27\overset{o}{\mathop{\text{A}}}\,$

D) $5.08\overset{o}{\mathop{\text{A}}}\,$

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• question_answer29) In hydrogen atom, the electron in a given orbit has total energy$-1.5eV$. The potential energy is

A) 1.5eV

B) $-1.5eV$

C) 3.0eV

D) $-3.0eV$

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• question_answer30) An oxide coated filament is useful in vacuum tubes because essentially

A) it has high melting point

B) it can without and high temperature

C) it has good mechanical strength

D) it can emit electrons of relatively lower temperature

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• question_answer31) Dimension of$\frac{L}{RCV}$is

A) $[{{A}^{-1}}]$

B) $[{{A}^{-2}}]$

C) $[A]$

D) $[{{A}^{2}}]$

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• question_answer32) The radii of curvature of the two surfaces of a lens are 20 cm and 30 cm and the reparative index of the material of the lens is 1.5. If the lens is concave-convex, then the focal length of the lens is

A) 24 cm

B) 10 cm

C) 15 cm

D) 120 cm

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• question_answer33) A wire carrying current i and other carrying is in the same direction produce a magnetic field B at the midpoint. What will be the field when 2i current is switched off?

A) B/2

B) 2B

C) 0

D) 4B

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• question_answer34) The Reynolds number of a flow is the ratio of

A) gravity to viscous force

B) gravity force to pressure force

C) inertia force to viscous force

D) viscous forces to pressure force

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• question_answer35) In a transistor circuit, the base current changes from$30\mu A$to$90\mu A$. If the current gain of the transistor is 30%, the change in the collector current is

A) 4 mA

B) 2 mA

C) 3.5 mA

D) 1.8 mA

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• question_answer36) A drift velocity of free electrons in a conductor is${{\upsilon }_{d}}$, when the current i is flowing in it. If both the radius and current are doubled, the drift velocity will be

A) $\frac{{{v}_{d}}}{8}$

B) $\frac{{{v}_{d}}}{4}$

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

D) ${{v}_{d}}$

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• question_answer37) The maximum range of a gun on horizontal terrain is 16 km if$g=10\text{ }m/{{s}^{2}}$. What must be the muzzle velocity of the shell?

A) 200 m/s

B) 100 m/s

C) 400 m/s

D) 300 m/s

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• question_answer38) The length, breath and thickness of a block are given by$l=12\text{ }cm,\text{ }b=6\text{ }cm$and$t=2.45\text{ }cm$. The volume of the block according to the idea of significant figure should be

A) $1\times {{10}^{2}}c{{m}^{2}}$

B) $2\times {{10}^{2}}c{{m}^{3}}$

C) $1.763\times {{10}^{2}}c{{m}^{2}}$

D) None of these

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• question_answer39) Two bulbs rated 200 W, 220V and 100 W, 220V, are connected in series, combination is connected to 220 V supply. Power consumed by the circuit is

A) 80 W

B) 67 W

C) 76 W

D) 65 W

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• question_answer40) In a full wave rectifier, input AC current has a frequency v. The output frequency of current is

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

B) $v$

C) $2v$

D) None of these

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• question_answer41) When the distance between slits of Youngs double slit experiment is reduced to half then the fringe middle will become

A) constant

B) four times

C) two times

D) half

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• question_answer42) Magnetic field intensify at the centre of coil of 50 turns, 0.5m radius and carrying a current of 2A, is

A) $5\times {{10}^{-5}}T$

B) $3\times {{10}^{-5}}T$

C) $1.25\times {{10}^{-4}}T$

D) $0.5\times {{10}^{-5}}T$

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• question_answer43) The minimum wavelength of X-ray emitted by X-ray tube is$0.4125\text{ }\overset{o}{\mathop{\text{A}}}\,$. The accelerating voltage is

A) 30kV

B) 50kV

C) 80RV

D) 60kV

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• question_answer44) A monoatomic gas supplied the heat Q very slowly keeping the pressure constant. The work done by the gas will be

A) $\frac{2}{3}Q$

B) $\frac{3}{5}Q$

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

D) $\frac{1}{5}Q$

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• question_answer45) Light of wavelength 488 nm is produced by organ laser, which is used in the photoelectric effect. When light from this spectral line is incident on the emitter, the stopping (cut-off) potential of photoelectron is 0.38 V. Find the work function of the material from which the emitter is made.

A) 1.25eV

B) 2.17eV

C) 4.07eV

D) 3.57eV

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• question_answer46) A mass m is suspended from the two springs of spring constants${{k}_{1}}$and${{k}_{2}}$as shown. The time period of vertical oscillations of the mass will be A) $2\pi \sqrt{\left( \frac{{{k}_{1}}+{{k}_{2}}}{m} \right)}$

B) $2\pi \sqrt{\left( \frac{m}{{{k}_{1}}+{{k}_{2}}} \right)}$

C) $2\pi \sqrt{\frac{m({{k}_{1}}{{k}_{2}})}{{{k}_{1}}+{{k}_{2}}}}$

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

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• question_answer47) A copper wire and a steel wire of the same diameter and length are connected end to end and a force is applied which stretches their combined length by 1 cm. Then the two wires will have

A) the same stress and strain

B) the same stress but different strain

C) the same strain but difference stress

D) difference, stress and strain

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• question_answer48) Which of the following have higher specific change?

A) Positorn

B) Proton

C) He

D) None of these

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• question_answer49) A beam of light after reflection on a plane mirror forms a real image. The beam is

A) convergent

B) divergent

C) parallel to axis

D) parallel but not to axis of mirror

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• question_answer50) A straight conductor of length 0.4 m is moved with a speed of 7 m/s perpendicular to the magnetic field of intensity of$0.9\text{ }Wb/{{m}^{2}}$. The induced emf across the conductor will be

A) 7.25V

B) 5.54V

C) 1,25V

D) 2.52V

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• question_answer51) If the heat of 110 J is added to a gaseous system, whose internal energy is 40 J. Then the amount of external work done is

A) 140J

B) 70J

C) 110J

D) 150J

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• question_answer52) The nature of light waves is similar to

A) cosmic rays

B) cathode rays

C) gamma rays

D) alpha rays

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• question_answer53) A body is thrown with a velocity of 9.8 m/s making an angle of $30{}^\circ$ with the horizontal. It will hit the ground after a time

A) 1.5s

B) 1s

C) 3s

D) 2s

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• question_answer54) Rain drops are spherical in shape due to

A) acceleration due to gravity

B) downward motion

C) surface tension

D) capillary

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• question_answer55) For molecules of a gas have speeds 1, 2, 3 and 4 km/s. The value of the root mean square speed of the gas molecules is

A) $\frac{1}{2}\sqrt{15}$km/s

B) $\frac{1}{2}\sqrt{10}$km/s

C) 2.5km/s

D) $\frac{\sqrt{15}}{2}$km/s

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• question_answer56) If$\sigma =$surface change density,$\varepsilon =$electric permittivity, the dimensions of$\frac{\sigma }{\varepsilon }$is same as

A) electric force

B) electric field intensity

C) pressure

D) electric charge

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• question_answer57) A conducting sphere of radius 30 cm is given a charge of$1.2\times {{10}^{-8}}C$. What will be its potential?

A) 0.03kV

B) 0.9kV

C) 1.8kV

D) 3.6kV

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• question_answer58) A simple pendulum of length$l$has a maximum angular displacement Q. The maximum kinetic energy of the bob is

A) $mgf(1-cos\theta )$

B) $0.5\text{ }mgl$

C) $mgl$

D) $2\,mgl$

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• question_answer59) Radius of orbit of satellite of earth is R its kinetic energy is proportional to

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

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

C) $R$

D) $\frac{1}{{{R}^{3}}}$

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• question_answer60) The energy of an X-ray photon is 2 keV, then its frequency will be

A) $3.2\times {{10}^{-6}}$per second

B) $5\times {{10}^{17}}$per second

C) $2\times {{10}^{17}}$per second

D) $2\times {{10}^{18}}$8 per second

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• question_answer61) Which of the following statements is not an essential feature of an optically active molecule?

A) It will rotate the plane of polarised light

B) It will have a non-superimposable mirror image

C) It will have no element of symmetry

D) It will have an asymmetric carbon atom

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• question_answer62) The$p{{K}_{a}}$of phenol is 10. Which of the following bases will deprotonate phenol Completely? $NaN{{H}_{2}}(p{{K}_{a}}ofN{{H}_{3}}=35),NaOH(p{{K}_{a}}$of${{H}_{2}}O=16),$$Na{{H}_{2}}(p{{K}_{a}}ofNH_{4}^{+}=10),$$NaOOCC{{H}_{3}}$ $(p{{K}_{a}}ofC{{H}_{3}}COOH=5)$

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

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

C) $NaN{{H}_{2}}$and$NaOH$

D) $N{{H}_{3}}$and $NaOCOC{{H}_{3}}$

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• question_answer63) Which one of the following is the most stable reactive intermediate?

A) B) C) D) View Answer play_arrow
• question_answer64) The reagent which could distinguish between 1-hexyne and 1-hexene is

A) $Ag(N{{H}_{3}})_{2}^{+}$

B) $KMn{{O}_{4}}$

C) $B{{r}_{2}}$in$CC{{l}_{4}}$

D) ${{H}_{2}}S{{O}_{4}}$

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• question_answer65) Choose the correct reagent required to carry out the transformation. A) Zn + cone.$HCl$

B) Cone. ${{H}_{2}}S{{O}_{4}}$

C) Li then${{H}_{2}}O$

D) ${{H}_{2}}/Pt$

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• question_answer66) $N{{O}_{2}}$ (brown colour gas) exists in equilibrium with${{N}_{2}}{{O}_{4}}$(colourless gas) as gjlven by chemical equation. $\underset{(brown)}{\mathop{2N{{O}_{2}}}}\,\underset{(colourless)}{\mathop{{{N}_{2}}{{O}_{4}}}}\,$ Mixture is slightly brown due to existence of$N{{O}_{2}}$. If pressure is increased

A) colour intensity is increased

B) colour intensity is decreased

C) colour intensity first increases and then decreases

D) No change in colour intensity

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• question_answer67) Spontaneous adsorption of gas on solid surface is an exothermic process because

A) $\Delta H$increases for system

B) $\Delta S$increases for gas

C) $\Delta S$decreases for gas

D) $\Delta G$increases for gas

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• question_answer68) $\Delta H_{f}^{o}({{C}_{2}}{{H}_{5}}),\Delta H_{f}^{o}({{C}_{2}}{{H}_{6}})$are${{x}_{1}}$and${{x}_{2}}$kcal $mo{{l}^{-1}}$respectively. Then heat of hydrogenation of ${{C}_{2}}{{H}_{4}}$is

A) ${{x}_{1}}+{{x}_{2}}$

B) ${{x}_{1}}-{{x}_{2}}$

C) $-({{x}_{1}}-{{x}_{2}})$

D) ${{x}_{1}}+2{{x}_{2}}$

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• question_answer69) The heat of formation of${{C}_{12}}{{H}_{22}}{{O}_{11}}(s),C{{O}_{2}}(g)$ and${{H}_{2}}O(l)$are$-530,-94.3$and$-68.3$kcal $mo{{l}^{-1}}$respectively. The amount of${{C}_{12}}{{H}_{22}}{{O}_{11}}$to supply 2700 kcal of energy is

A) 382.70 g

B) 832.74 g

C) 463.9 g

D) 684.0 g

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• question_answer70) 0.1 M solution of$C{{H}_{3}}COOH$should be diluted to how many times so that pH is doubled?

A) 4.0 times

B) $5.55\times {{10}^{4}}$times

C) $5.55\times {{10}^{6}}$times

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

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• question_answer71) If the equilibrium constant of the reaction of weak acid HA with strong base is${{10}^{9}},$then pH of 0.1 M NaA is

A) 5

B) 9

C) 7

D) 8

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• question_answer72) Which is maximum hydrated?

A) $NaCl$

B) $MgC{{l}_{2}}$

C) $AlC{{l}_{3}}$

D) $SiC{{l}_{4}}$

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• question_answer73) For the process,$X(g)+{{e}^{-}}\xrightarrow[{}]{{}}{{X}^{-}}(g);\Delta H=x$and ${{X}^{-}}(g)\xrightarrow[{}]{{}}X(g)+{{e}^{-}};\Delta H=y$select correct alternate.

A) lonisation energy of${{X}^{-}}(g)$ is y

B) Electron affinity of$X(g)$is$x$

C) Electron affinity of$X(g)$is$-y$

D) All of the above

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• question_answer74) Mass of one atom is$6.66\times {{10}^{-23}}g$. Its percentage in an hydride is 95.24. Thus, hydride is

A) MH

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

C) $M{{H}_{3}}$

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

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• question_answer75) Which can dissolve${{I}_{2}}$?

A) $KI$

B) $NaI$

C) Both (a) and (b)

D) None of these

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• question_answer76) Ozone layer is being depleted. This is due to

A) No (nitric oxide) emission from supersonic jets

B) chlorofluoro carbon used as aerosols

C) Both (a) and (b)

D) None of the above

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• question_answer77) The oxygen carrying pigment, oxy-haemocyanin containing two copper ions is diamagnetic, because

A) the two copper ions are in + 1 oxidation state

B) one copper ion is in + 1 oxidation state while other is in + 2 oxidation state

C) of the strong antiferromagnetic interactions between two copper ions

D) of the ferromagnetic interactions between the two copper ions

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• question_answer78) Which is not true statement?

A) Ions of d-block elements are coloured due to d-d transition

B) lons of$f-$block elements are coloured due to$f-f$transition

C) ${{[Sc{{({{H}_{2}}O)}_{6}}]}^{3+}},{{[Ti{{({{H}_{2}}O)}_{6}}]}^{4+}}$are coloured complexes

D) $C{{u}^{+}}$ is colourless ion

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• question_answer79) The crystal field splitting for$C{{r}^{3+}}$ion in an octahedral field increases for ligands ${{I}^{-}},{{H}_{2}}O,$ $N{{H}_{3}},C{{N}^{-}}$ and the order is

A) ${{\text{I}}^{-}}<{{H}_{2}}O<N{{H}_{3}}<C{{N}^{-}}$

B) $C{{N}^{-}}<{{\text{I}}^{-}}<{{H}_{2}}O<N{{H}_{3}}$

C) $C{{N}^{-}}<N{{H}_{3}}<{{H}_{2}}O<{{I}^{-}}$

D) $N{{H}_{3}}<{{H}_{2}}O<{{I}^{-}}<C{{N}^{-}}$

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• question_answer80) The reaction between metallic silver and aqueous$NaCN$forming a soluble complex occurs in the presence of

A) nitrogen

B) oxygen

C) helium

D) chlorine

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• question_answer81) A 1 L flask contains 32 g${{O}_{2}}$gas at$27{}^\circ C$. What mass of${{O}_{2}}$must be released to reduce the pressure in the flask to 12.315 atm?

A) 8 g

B) 16 g

C) 24 g

D) 32 g

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• question_answer82) 1 mol of${{O}_{2}}$and$x$mol of Ne in a 10 L flask at constant temperature exert a pressure of 10 atm. If partial pressure of${{O}_{2}}$is 2 atm, moles of Ne in the mixture is

A) 1

B) 2

C) 3

D) 4

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• question_answer83) A 25 W bulb emits monochromatic yellow light of wavelength of 0.57pm. Calculate the rate of emission of quanta per second.

A) $7.169\times {{10}^{19}}$

B) $4.569\times {{10}^{19}}$

C) $8.579\times {{10}^{19}}$

D) $9.662\times {{10}^{19}}$

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• question_answer84) The correct set of quantum numbers for the unpaired electron of a chlorine atom is

A) $2,0,0,+\frac{1}{2}$

B) $2,1,-1,+\frac{1}{2}$

C) $3,1,-1,\pm \frac{1}{2}$

D) $3,0,0,\pm \frac{1}{2}$

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• question_answer85) Calculate the radius of a water molecule assuming to be spherical (density$=1\text{ }g\text{ }m{{L}^{-1}}$).

A) $1.925\times {{10}^{-8}}cm$

B) $1.925\times {{10}^{-9}}cm$

C) $1.925\times {{10}^{-10}}cm$

D) $1.925\times {{10}^{-11}}cm$

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• question_answer86) When 6g of a monobasic acid is dissolved in 100 mL solution, it is 1 N. What is equivalent mass of the acid?

A) $20\text{ }gequi{{v}^{-1}}$

B) $40\text{ }gequi{{v}^{-1}}$

C) $60\text{ }gequi{{v}^{-1}}$

D) $80\text{ }gequi{{v}^{-1}}$

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• question_answer87) Each$N{{H}_{3}}$molecule has six other$N{{H}_{3}}$molecules as nearest neighbours in solid state; AH of sublimation of $N{{H}_{3}}$ molecule at the m. p is$30.8\text{ }kJ\text{ }mo{{l}^{-1}}$and in the absence of H-bonding estimated$\Delta H$of sublimation is$14.4\text{ }kJ\text{ }mo{{l}^{-1}}$. Hence, strength of H-bond in solid$N{{H}_{3}}$is

A) $5.47\text{ }kJ\text{ }mo{{l}^{-1}}$

B) $\text{10}\text{.93 }kJ\text{ }mo{{l}^{-1}}$

C) $\text{16}\text{.40 }kJ\text{ }mo{{l}^{-1}}$

D) $\text{-16}\text{.4 }kJ\text{ }mo{{l}^{-1}}$

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• question_answer88) A mineral having the formula$A{{B}_{2}}$crystallizes in the cubic close-packed lattice, with the A atoms occupying the lattice points. The fraction of the tetrahedral sites occupied by B atoms is

A) 20%

B) 40%

C) 60%

D) 100%

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• question_answer89) Which of the following is true regarding teflon?

A) It is a linear, unbranched polymer of tetrafluoro ethylene

B) It has very high thermal stability

C) Polymer molecules are associated by strong dipole-dipole attraction

D) All of the above

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• question_answer90) Cellulose has very high degree of hydrophilicity because of

A) its amorphous nature

B) crystalline nature

C) presence of excessive voids in solid state

D) presence of many hydroxyl groups on the polymer back bone

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• question_answer91) By adding sodium dodecyl sulphate, during the electrophoresis of proteins, it is possible to

A) determine a proteins isoelectric point

B) determine an enzymes specific activity

C) determine the amino acid composition of the protein

D) presence a proteins native structure and biological activity

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• question_answer92) Which of the following aldoses gives an optically active compound upon reaction with warm dilute nitric acid?

A) B) C) D) View Answer play_arrow
• question_answer93) In the a-helix, the hydrogen bonds

A) are roughly parallel to the axis of the helix

B) are roughly perpendicular to the axis of the helix

C) occur mainly between electronegative atoms of the R groups

D) occur only between some of the amino acids of the helix

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• question_answer94) Which one of the following antioxidant commonly used to increase the storage life of butter?

A) Butylated hydroxy anisol

B) Sodium sulphite

C) Sodium metabisulphite

D) All of the above

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• question_answer95) Which of the following compounds is the weakest Bronsted base?

A) B) C) D) View Answer play_arrow
• question_answer96) $C{{H}_{3}}CHO\xrightarrow[{}]{oxidatton}(A)\xrightarrow[{}]{PC{{l}_{5}}}(B)\xrightarrow[{}]{C{{H}_{3}}COONa}$ Compound is

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

B) $C{{H}_{3}}COC{{H}_{3}}$

C) $C{{H}_{3}}COOC{{H}_{3}}$

D) $C{{H}_{3}}COO{{C}_{2}}{{H}_{5}}$

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• question_answer97) The strongest acid among the following compound is

A) $HCOOH$

B) $C{{H}_{3}}C{{H}_{2}}CH(Cl)COOH$

C) $ClC{{H}_{2}}C{{H}_{2}}C{{H}_{2}}COOH$

D) $C{{H}_{3}}COOH$

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• question_answer98) Phenol, when it first react with cone. Sulphuric acid and then with cone. nitric acid gives

A) nitrobenzene

B) 2,4,6-trinitrobenzene

C) o-nitrophenol

D) p-nitrophenol

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• question_answer99) During dehydration of alcohols to alkenes by heating with cone. 112804, the initial step is

A) formation of an ester

B) protonation of alcohol molecule

C) formation of carbocation

D) elimination of water

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• question_answer100) Arrange the following compounds in increasing order of rate of reaction towards nucleophilic substitution. A) $I<II<III$

B) $I<III<II$

C) $III<II<I$

D) $II<III<I$

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• question_answer101) Which one of the following is incorrect?

A) lonisation enthalpy of molecular oxygen is very close to that of$Xe$

B) Only type of interatomic interaction between particles of noble gases are weak dispersion forces

C) Hydrolysis of $Xe{{F}_{6}}$ is not a redox reaction

D) Xenon fluorides are not reactive

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• question_answer102) Which one of the following is not tetrahedral in shape?

A) $SiC{{l}_{4}}$

B) $NH_{4}^{+}$

C) ${{N}_{2}}{{O}_{4}}$

D) $S{{F}_{4}}$

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• question_answer103) Which one of the following nitrogen oxides does not contain$N-N$bonds?

A) ${{N}_{2}}O$

B) ${{N}_{2}}{{O}_{3}}$

C) ${{N}_{2}}{{O}_{4}}$

D) ${{N}_{2}}{{O}_{5}}$

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• question_answer104) Extent of adsorption of adsorbate from solution phase increases with

A) increase in amount of adsorbate in solution

B) decrease in surface area of adsorbent

C) increase in temperature of solution

D) decrease in amount of adsorbate in solution

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• question_answer105) Which of the following is a negatively charged sol?

A) Sol of charcoal

B) Haemoglobin

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

D) Basic dye stuffs

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• question_answer106) Which of the following elements is present as the impurity to the maximum extent in w iron?

A) Phosphorus

B) Manganese

C) Carbon

D) Silicon

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• question_answer107) Which metallurgy does not involve leaching?

A) Fe

B) Ag

C) Au

D) $Al$

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• question_answer108) The role of a catalyst is to change

A) enthalpy of reaction

B) equilibrium constant

C) activation energy of reaction

D) Gibbs energy of reaction

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• question_answer109) Which one of the following options is not correct for the decomposition reaction of$N{{H}_{3}}$? $2N{{H}_{3}}(g)\xrightarrow[Pt\text{ }catalyst]{1130K,at\,high\,p}{{N}_{2}}(g)+3{{H}_{2}}(g)$

A) Rate of reaction = rate constant

B) Further increase in pressure will change the rate of reaction

C) Rate of decomposition of$N{{H}_{3}}$will remain constant until $N{{H}_{3}}$disappears completely

D) Rate of reaction depends on concentration of$N{{H}_{3}}$

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• question_answer110) For the reaction,$a+A+bB\xrightarrow[{}]{{}}cC,$if $-3\frac{d[A]}{dt}$ $=-3\frac{d[B]}{dt}=+1.5\frac{d[C]}{dt}$then a, b and c respectively are

A) 1, 3, 2

B) 1, 2, 3

C) 3, 2, 1

D) 3, 1, 2

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• question_answer111) When 2.495 g of$CuS{{O}_{4}}.x{{H}_{2}}O$(molar mass 249.5) is heated, 0.05 mole of${{H}_{2}}O$is lost. Therefore,$x$is

A) one

B) three

C) five

D) seven

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• question_answer112) ${{N}_{p}}$is isoelectroriic to$C{{O}_{2}}$and$N_{3}^{-}$. Which of the following is the structure of${{N}_{2}}O$?

A) B) $N-O-N$

C) $N-N-O$

D) View Answer play_arrow
• question_answer113) Number of lone pair in$XeO{{F}_{4}}$is

A) zero

B) one

C) two

D) three

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• question_answer114) Which of the following is a favourable factor for cation formation?

A) Low ionisation potential

B) High electron affinity

C) High electronegativity

D) Small atomic size

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• question_answer115) 60 g of urea is dissolved in 1100 g solution. To keep$\Delta {{T}_{f}}/{{K}_{f}}$as 1 mol$k{{g}^{-1}}$, water separated in the form of ice is

A) 40 g

B) 60 g

C) 100 g

D) 200 g

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• question_answer116) Osmosis involved in

A) excretion of urine

B) interchange of nutrients and waste products betweeen tissue cells and their surroundings

C) in both cases

D) None of the above

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• question_answer117) Vapour density of$PC{{l}_{5}}(g)$dissociating into $PC{{l}_{3}}(g)$and$C{{l}_{2}}(g)$is 100. Hence, vant Hoff factor for the case $PC{{l}_{5}}(g)PC{{l}_{3}}(g)+C{{l}_{2}}(g)$ is

A) 1.85

B) 3.70

C) 1.085

D) 1.0425

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• question_answer118) Ionic conductances of ${{H}^{+}}$ and$SO_{4}^{2-}$at infinite dilution are$x$and y$S\,c{{m}^{2}}equi{{v}^{-1}}$. Hence, equivalent conductance of${{H}_{2}}S{{O}_{4}}$at infinite dilution is

A) $(x+y)$

B) $2(x+y)$

C) $2x+y$

D) $x+2y$

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• question_answer119) In the refining of silver by electrolytic method, what will be the weight of 100 g Ag anode if 5A current is passed for hours? The purity of silver anode is 95% by weight.

A) 42.91 g

B) 57.59 g

C) 13.69g

D) 36.38 g

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• question_answer120) Salt bridge contains

A) calomel

B) corrosive sublimate

C) agar-agar paste

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

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• question_answer121) A function of lysosomes is

A) replication

B) hydrolysis

C) respiration

D) None of the above

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• question_answer122) Mitochondria and chloroplasts are similar because

A) both have 80S ribosomes

B) both have nuclei

C) both have single membrane envelope

D) both have DNA

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• question_answer123) The oldest fossil belongs to which of the following group of plants/animals?

A) Asteriodae

B) Rhodophyceae

C) Blue green algae

D) Phaeophyceae

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• question_answer124) The term phylum was given by

A) Haeckel

B) Linnaeus

C) Cuvier

D) Theophrastus

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• question_answer125) Mehlis gland in tapeworm is associated with

A) respiration

B) reproduction

C) excretion

D) circulation

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• question_answer126) Which of the following animals has a tetramorphic colony?

A) Velella

B) Physalia

C) Obelia

D) Porpita

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• question_answer127) Viral genome incorporated into host DNA is called

A) prophase

B) plasmid

C) prophage

D) bacteriophage

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• question_answer128) Select the correct set of animals of class-Mammalia.

A) Lion, bat. whale, ostrich

B) Whale, bat, kangaroo, hippopotamus

C) Lion, hippopotamus, penguin, bat

D) Hippopotamus, penguin, whale, kangaroo

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• question_answer129) Which of the following statements regarding universal rules of nomenclature is wrong?

A) The first word denoting the genus starts with a capital letter

B) The first word in a biological name represents the genus

C) Biological names are generally in Greek and written in italics

D) Both the words in a biological name, when hand-written, are separately underlined

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• question_answer130) Select the type of enzyme involved in the following reaction. $S-G+S\xrightarrow[{}]{{}}S+S-G$

A) Lyase

B) Transferase

C) Hydrolase

D) Dehydrogenase

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• question_answer131) Ringers solution contains

A) $N{{a}^{+}}+C{{l}^{-}}$ ions

B) $N{{a}^{+}}+{{K}^{+}}$ ions

C) $N{{a}^{+}}+{{K}^{+}}+C{{l}^{-}}$ions

D) ${{K}^{+}}+C{{l}^{-}}$ions

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• question_answer132) Match the column I with column II and choose the correct option.

 Column I Column II A. Goblet cells 1. Antibacterial agent B. Lysozyme 2. Mucous C. Saliva 3. $HCl$ D. Oxyntic cells 4. Sublingual gland
Codes

A) A-3 B-1 C-4 D-2

B) A-2 B-3 C-1 D-4

C) A-1 B-3 C-4 D-2

D) A-2 B-1 C-4 D-3

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• question_answer133) According to Boyles law, the product of pressure and volume is a constant. Hence,

A) if volume of lungs is increased, the pressure decreases disproportionately

B) if volume of lungs is increased, the pressure remains the same

C) if volume of lungs is increased, the pressure decreases proportionately

D) if volume of lungs is increased, the pressure also increases proportionately

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• question_answer134) Ivan Pavlov performed experiments on

A) origin of life

B) cardiac reflexes

C) simple reflexes

D) conditioned reflexes

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• question_answer135) Marasmus in children is caused by deficiency of

A) protein

B) fats

C) vitamins

D) carbohydrates

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• question_answer136) Given below are four methods (A to D) and their modes of action (1 to 4) in achieving contraception. Select their correct matching from the four options that follow.

 Column I Column II A. The Pill 1. Prevents sperms reaching cervix B. Condom 2. Prevents implantation C. Vasectomy 3. Prevents ovulation D. Copper-T 4. Semen contains no sperms
Codes

A) A-3, B-4, C-1, D-2

B) A-2, B-3, C-1, D-4

C) A-3, B-1, C-4, D-2

D) A-4,B-1,C-2,D-3

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• question_answer137) Bilirubin and biliverdin are

A) enzymes

B) bile salts

C) bile pigments

D) None of these

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• question_answer138) When the organic acid is oxidised in respiration, the value of R.Q. becomes

A) zero

B) one

C) less than one

D) more than one

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• question_answer139) The crossing of a homozygous tall pea plant and homozygous dwarf pea plant would yield plants in the ratio of

A) 2 tall: 2 dwarf

B) all heterozygous tall

C) all homozygous dwarf

D) one homozygous tall; one homozygous dwarf; two heterozygous tall

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• question_answer140) The off springs obtained by mating two pure strains having constrasting characters are called as

A) mutants

B) hybrids

C) ${{F}_{2}}-$generation

D) P-generation

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• question_answer141) Which of the following genotypes does not produce a sugar polymer on the surface of the RBCs?

A) ${{I}^{A}}{{I}^{A}}$

B) ${{I}^{A}}{{I}^{i}}$

C) $ii$

D) ${{I}^{A}}{{I}^{B}}$

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• question_answer142) Tectonic is the study of

A) volcanoes

B) sand dunes

C) earthquakes

D) earths crust

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• question_answer143) Recognition sequence in Eco RI is

A) GGCC

B) GAATTC

C) AAGCTT

D) CTGCAG

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• question_answer144) During gene cloning, which is called gene taxi?

A) Plasmid

B) Protozoa

C) Vaccine

D) Bacterium

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• question_answer145) Flavr savr variety of tomato is a

A) mutated form

B) somaclonal variety

C) transgenic crop

D) high yielding variety

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• question_answer146) If the decomposers become extinct, the most severally affected would be

A) bio magnification

B) damage to nitrogen fixation

C) non-cycling of minerals

D) carnivores will be starved

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• question_answer147) Which of the following is false?

A) The energy content in a trophic level is determined by considering individuals of a species in that trophic level

B) The succession that occur in newly cooled lava is called primary success

C) Rate of succession is faster in secondary succession

D) Quantity of biomass in a trophic level at a particular period is called as stop-(standing) crop

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• question_answer148) Ratio between mortality and natality is called

A) population ratio

B) vital index

C) census ratio

D) density coefficient

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• question_answer149) What is not true about alleles?

A) Round and wrinkled form of genes are alleles of each other

B) Only recessive alleles expreses in hybrid

C) Alleles occupy same loci on homologous chromosomes

D) Two or more alternative forms of gene are called alfeles are allelomorphs

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• question_answer150) ABO blood grouping is controlled by gene I which has three alleles and show co dominance. There are six genotypes. How many phenotypes in all are possible?

A) Three

B) Six

C) Five

D) Four

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• question_answer151) In Mendelian monohybrid cross, phenotypic ratio in${{F}_{2}}$is$3:1$. How many types of gametes are formed in${{F}_{1}}-$generation?

A) Two types

B) Four types

C) Eight types

D) Only one types

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• question_answer152) Mendel enunciated

A) two principles of inheritance

B) four principles of inheritance

C) five principles of inheritance

D) three principles of inheritance

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• question_answer153) Auxin was first named by

A) C Darwin

B) FW Went

C) Alexopolus

D) KV Thimann

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• question_answer154) Which of the following inhibits${{O}_{2}}$release in light phase?

A) Zeatin

B) PMA

C) DCMU

D) None of these

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• question_answer155) The nitrifying bacteria that convert the ammonia to nitrates are

A) Nitrosomonas and Nitrobacter

B) Azotobacter

C) Rhizobium sp.

D) Thiobacillus denitrificans

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• question_answer156) Phototropic curvature in Avena coleoptile is the result of uneven distribution of

A) auxin

B) starch

C) gibberellins

D) phytochrome

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• question_answer157) Study of bakanae disease of rice led to discovery of

A) auxins

B) bakery rice

C) Both (a) and (b)

D) gibberellins

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• question_answer158) Equipment used for the measurement of growth in plants is known as

A) respirometer

B) auxanometer

C) atmometer

D) photometer

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• question_answer159) First transistory chemical formed by reaction between$C{{O}_{2}}$and RUBP is

A) PGA

B) PGAL/GAP

C) dihydroxy acetone phosphate

D) 2 carboxy, 3-keto, 1-5 biphosphoribotol

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• question_answer160) Tendrils exhibit

A) seismonasty

B) geotropism

C) heliotropism

D) thigmotropism

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• question_answer161) The carboxylating enzyme present in the bundle sheath cells of maize leaves is

A) RUBP carboxylase

B) hexokinase

C) carbonic anhydrase

D) PEP-carboxylase

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• question_answer162) Which of the following groups of plants are propagated through underground root?

A) Pistia, Chrysanthemum and pineapple

B) Ginger, potato, onion and zamikand

C) Sweet potato, Asparagus, Tapioca and dahlia

D) Bryophyllum and Kalanchoe

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• question_answer163) Artificial induction of roots on stems before it is separated from the parent plant for propagation is called

A) layering

B) root-stem joint

C) cutting

D) plant tissue culture

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• question_answer164) Match the following columns.

 Column I Column II A. Zoophily 1. Pollination by birds B. Ornithophily 2. Pollination by insects C. Entomophily 3. Pollination by bats. D. Chiropterophily 4. Pollination by animals
Codes

A) A-4, B-1, C-2, D-3

B) A-1, B-2, C-3, D-4

C) A-3, B-2, C-1, D-4

D) A-4, B-2, C-1, D-3

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• question_answer165) Consider the following four statements I, II, III and IV and select the right option.

 I. The floral formula for Liliaceae is II. In vexillary aestivation, the large posterior petal is called, standard, two lateral ones are wings and two small anterior petals are termed keel. III. In pea flower the stamens are monoadelphous. IV. The floral formula for Solanaceae is The correct statements are

A) II and III

B) I and III

C) I and II

D) III and IV

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• question_answer166) The scutellum observed in a grain of wheat or maize is comparable to which part of the seed in other monocotyledons?

A) Endosperm

B) Cotyledon

C) Plumule

D) Aleurone layer

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• question_answer167) Which of the following is the scientific or botanical name of Asafoetida (Hing)?

A) Curcuma longa

B) Curcuma amada

C) Alpinia galanga

D) None of these

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• question_answer168) Which one of the following classes not a representative of green-algae?

A) Chlorophyceae

B) Charophyceae

C) Euglenophyceae

D) Crysophyceae

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• question_answer169) Which of the following codons does not select any amino acid

A) UAG

B) UAA

C) UGA

D) All of these

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• question_answer170) Usually the activity of the enzymes is optimum at normal body temperature. At about$0{}^\circ C$the activity of the enzyme is

A) minimum

B) maximum

C) Both (a) and (b)

D) None of these

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