Solved papers for MGIMS WARDHA MGIMS WARDHA Solved Paper-2008

MGIMS WARDHA Solved Paper-2008 Total Questions - 180

1) A beam of light of wavelength 600 nm from a distant source falls on a single slit 1 mm wide and the resulting diffraction pattern is observed on a screen 2 m away. The distance between s   the first dark fringes on either side of the central bright fringe is

A)

1.2cm

B)

1.2mm

C)

2.4 cm

D)

2.4 mm

View Answer
2) A battery of emf 10 V and internal resistance 3 0 is connected to a resistor. The current in the circuit is 0.5 A. The terminal voltage of the battery when the circuit is closed is

A)

10 V

B)

zero

C)

1.5 V

D)

8.5V

View Answer
3) A galvanometer coil has a resistance of 15\[\Omega \] and gives full scale deflection for a current of 4 mA. To convert it to an ammeter of range 0 to 6A

A)

10 m\[\Omega \] resistance is to be connected in parallel to the galvanometer

B)

10 m\[\Omega \] resistance is to be connected in series with the galvanometer

C)

0.1\[\Omega \]resistance is to be connected in D parallel to the galvanometer

D)

0.1\[\Omega \] in resistance is to be connected in series with the galvanometer

View Answer
4) A Gaussian sphere encloses an electric dipole within it. The total flux across the sphere is

A)

zero

B)

half that due to a single charge

C)

double that due to a single charge

D)

dependent on the position of the dipole

View Answer
5) A parallel plate air capacitor has a capacitance C. When it is half filled with a dielectric of dielectric constant 5, the percentage increase in the capacitance will be

A)

400%

B)

66.6%

C)

33.3%

D)

200%

View Answer
6) The specific charge of a proton is \[9.6\times {{10}^{7}}\,\,C\,\text{k}{{\text{g}}^{-1}}.\]The specific charge of an alpha particle will be

A)

\[9.6\times {{10}^{7}}\,\,C\,\text{k}{{\text{g}}^{-1}}\]

B)

\[19.6\times {{10}^{7}}\,\,C\,\text{k}{{\text{g}}^{-1}}\]

C)

\[4.8\times {{10}^{7}}\,\,C\,\text{k}{{\text{g}}^{-1}}\]

D)

\[2.4\times {{10}^{7}}\,\,C\,\text{k}{{\text{g}}^{-1}}\]

View Answer
7) When light of wavelength 300 nm falls on a photoelectric emitter, photoelectrons are liberated. For another emitter, light of wavelength 600 nm is sufficient for liberating photoelectrons. The ratio of the work function of the two emitters is

A)

1 : 2

B)

2 : 1

C)

4 : 1

D)

1 : 4

View Answer
8) If \[{{\lambda }_{1}}\] and \[{{\lambda }_{2}}\] are the wavelengths of the first members of the Lyman and Paschen series respectively, then \[{{\lambda }_{1}}\]:\[{{\lambda }_{2}}\] is

A)

1 : 3

B)

1 : 30

C)

7 : 50

D)

7 : 108

View Answer
9) Activity of a radioactive sample decreases to \[{{(1/3)}^{rd}}\]of its original value in 3 days. Then, in 9 days its activity will become

A)

(1/27) of the original value

B)

(1/9) of the original value

C)

(1/18) of the original value

D)

(1/3) of the original value

View Answer
10) Identify the operation performed by the circuit given below.

A)

NOT

B)

AND

C)

OR

D)

NAND

View Answer
11) The working of which of the following is similar to that of a slide projector?

A)

Electron microscope

B)

Scanning electron microscope

C)

Transmission electron microscope

D)

Atomic force microscope

View Answer
12) In a transistor the collector current is always less than the emitter current because

A)

collector side is reverse biased and the emitter side is forward biased

B)

a few electrons are lost in the base and only remaining ones reach the collector

C)

collector being reverse biased, attracts less electrons

D)

collector side is forward biased and emitter side is reverse biased

View Answer
13) Specific rotation of sugar solution is O.5 deg kg. 200 kgm-3 of impure sugar solution is taken in a sample polarimeter tube of length 20 cm and optical rotation is found to be 19°. The percentage of purity of sugar is

A)

20%

B)

80%

C)

95%

D)

89%

View Answer
14) A simple pendulum has a length \[l\] and the mass of the bob is m. The bob is given a charge q coulomb. The pendulum is suspended between the vertical plates of a charged parallel plate capacitor. If E is the electric field strength between the plates, the time period of the pendulum is given by

A)

\[2\pi \sqrt{\frac{l}{g}}\]

B)

\[\sqrt{\frac{l}{\sqrt{g+\frac{qE}{m}}}}\]

C)

\[2\pi \sqrt{\frac{l}{\sqrt{g-\frac{qE}{m}}}}\]

D)

\[\sqrt{\frac{l}{\sqrt{{{g}^{2}}+{{\left( \frac{qE}{m} \right)}^{2}}}}}\]

View Answer
15) A gang capacitor is formed by interlocking a number of plates as shown in figure. The distance between the consecutive plates is 0.885 cm and the overlapping area of the plates is 5 cm2. The capacity of the unit is

A)

1.06 pF

B)

4 pF

C)

6.36 pF

D)

12.72 pF

View Answer
16) A satellite in a circular orbit of radius R has a period of 4 h. Another satellite with orbital radius 3 R around the same planet will have a period (in hours)

A)

\[16\]

B)

\[4\]

C)

\[4\sqrt{27}\]

D)

\[4\sqrt{8}\]

View Answer
17) The unit of Stefan's constant is

A)

\[W{{m}^{-2}}{{K}^{-1}}\]

B)

\[Wm\,{{K}^{-4}}\]

C)

\[W{{m}^{-2}}\,{{K}^{-4}}\]

D)

\[N{{m}^{-2}}\,{{K}^{-4}}\]

View Answer
18) A Carnot engine takes heat from a reservoir at 627°C and rejects heat to a sink at 27°C. Its efficiency will be

A)

3/5

B)

1/3

C)

2/3

D)

200/209

View Answer
19) A battery consists of a variable number (n) of identical cells, each having an internal resistance r connected in series. The terminals of the battery are short-circuited. A graph of current (\[l\] in the circuit versus the number of cells will be as shown in figure

A)

B)

C)

D)

View Answer
20) A tuning fork A produces 4 beats/s with another tuning fork B of frequency 320 Hz, On filling one of the prongs of A 4 beats/s are again heard when sounded with the same font B. Then, the frequency of the fork A before filling is

A)

328 Hz

B)

316 Hz

C)

324 Hz

D)

320 Hz

View Answer
21) When the length of the vibrating segment of a sonometer wire is increased by 1%, the percentage change in its frequency is

A)

100/101

B)

99/100

C)

1

D)

2

View Answer
22) The equation of a simple harmonic wave is given by y = 5 sin                                                                                                             \[\frac{\pi }{2}\] (100 t - x), where x and y are in metre and time is in second. The period of the wave in second will be

A)

0.04

B)

0.01

C)

1

D)

5

View Answer
23) In a LCR series circuit, the potential difference between the terminals of the inductance is 60 V, between the terminals of the capacitor is 30 V and that across the resistance is 40 V. Then, supply voltage will be equal to

A)

50V

B)

70V

C)

130V

D)

10 V

View Answer
24) A solenoid 1.5 m long and 0.4 cm in diameter possesses 10 turns/cm length. A current of 5 A falls through it. The magnetic field at the axis inside the solenoid is

A)

\[2\pi \times {{10}^{-3}}T\]

B)

\[2\pi \times {{10}^{-5}}T\]

C)

\[4\pi \times {{10}^{-2}}T\]

D)

\[4\pi \times {{10}^{-3}}T\]

View Answer
25) A choke is preferred to a resistance for limiting current in AC circuit because

A)

choke is cheap

B)

there is no wastage of power

C)

choke is compact in size

D)

choke is a good absorber of heat

View Answer
26) A current of 6 A enters one comer P of an equilateral triangle PQR having 3 wires of resistances 2\[\Omega \] each and leaves by the comer R. Then the current                                                                                                                  \[{{I}_{1}}\] and                                                                                                                  \[{{I}_{2}}\] are

A)

2A.4A

B)

4A.2A

C)

1A.2A

D)

2 A, 3 A

View Answer
27) To a germanium crystal equal number of aluminium and indium atoms are added. Then

A)

it remains an intrinsic semiconductor

B)

it becomes a n-type semiconductor

C)

it becomes a p-type semiconductor

D)

it becomes an insulator

View Answer
28) Maximum velocity of the photoelectrons emitted by a metal surface is \[1.2\times {{10}^{6}}m{{s}^{-1}}.\] Assuming the specific charge of the electron to be \[1.8\times {{10}^{11}}C\,k{{g}^{-1}},\]the value of the stopping potential in volt will be

A)

2

B)

3

C)

4

D)

6

View Answer
29) Which of the following figures represents the variation of particle momentum and associated de-Broglie wavelength?

A)

B)

C)

D)

View Answer
30) If \[{{r}_{1}}\] and \[{{r}_{2}}\] are the radii of the atomic nuclei of mass numbers 64 and 125 respectively, then the ratio \[({{r}_{1}}/{{r}_{2}})\]is

A)

\[\frac{64}{125}\]

B)

\[\sqrt{\frac{64}{125}}\]

C)

\[5/4\]

D)

\[4/5\]

View Answer
31) All components of the electromagnetic spectrum in vacuum have the same

A)

energy

B)

velocity

C)

wavelength

D)

frequency

View Answer
32) A and B are two metals with threshold frequencies \[1.8\times {{10}^{14}}Hz\]and \[2.2\times {{10}^{14}}Hz.\] Two identical photons of energy 0.825 eV each are incident on them. Then photoelectrons are emitted by \[(Take\,h=6.6\times {{10}^{-34}}J-s)\]

A)

B alone

B)

A alone

C)

Neither A nor B

D)

Both A and B

View Answer
33) In the Wheat stone's network given, \[P=10\Omega ,\]\[Q=20\Omega ,R=15\Omega ,\]\[S=30\Omega ,\]the current passing through the battery (of negligible internal resistance) is

A)

0.36 A

B)

zero

C)

0.ISA

D)

0.72 A

View Answer
34) Electrons in a certain energy level n = \[{{n}_{1}}\], can emit 3 spectral lines. When they are in another energy level, n - \[{{n}_{2}}\], they can emit 6 spectral lines. The orbital speed of the electrons in the orbits are in the ratio

A)

4 : 3

B)

3 : 4

C)

2 : 1

D)

1 : 2

View Answer
35) A proton and a deuteron with the same initial kinetic energy enter a magnetic field in a direction perpendicular to the direction of the field. The ratio of the radii of the circular trajectories described by them is

A)

1 : 4

B)

\[1:\sqrt{2}\]

C)

1 : 1

D)

1 : 2

View Answer
36) Two identical capacitors each of capacitance 5 \[\mu F\] are charged to potentials 2 kV and 1 kV respectively. Their -ve ends are connected together. When the +ve ends are also connected together, the loss of energy of the system is

A)

160 J

B)

zero

C)

5 J

D)

3 1.25 J

View Answer
37) An inductance of \[\left( \frac{200}{\pi } \right)\] mH, a capacitance of \[\left( \frac{{{10}^{-3}}}{\pi } \right)\]F and a resistance of 100 are connected in series with an AC source 220 V, 50 Hz. The phase angle of the circuit is

A)

\[\frac{\pi }{6}\]

B)

\[\frac{\pi }{4}\]

C)

\[\frac{\pi }{2}\]

D)

\[\frac{\pi }{3}\]

View Answer
38) A step-down transformer reduces the voltage of a transmission line from 2200 V to 220 V. The power delivered by it is 880 W and its efficiency is 88%. The input current is

A)

4.65 mA

B)

0.045 A

C)

0.45 A

D)

4.65 A

View Answer
39) In Young's double slit experiment with sodium vapour lamp of wavelength 589 nm and the slits 0.589 mm apart, the half angular width of the central maximum is

A)

\[{{\sin }^{-1}}\,(0.01)\]

B)

\[{{\sin }^{-1}}\,(0.0001)\]

C)

\[{{\sin }^{-1}}\,(0.001)\]

D)

\[{{\sin }^{-1}}\,(0.1)\]

View Answer
40) A radioactive element forms its own isotope after 3 consecutive disintegrations. The particles emitted are

A)

3 \[\beta \]-particles

B)

2 \[\beta \]-particles and 1 \[1\alpha \]-particle

C)

2 \[\beta \]-particles and \[1\gamma \]-particle

D)

\[2\alpha \]-particles and 1 \[\beta \]-panicle

View Answer
41) A radioactive substance contains 10000 nuclei and its half-life period is 20 days. The number of nuclei present at the end of 10 days is

A)

7070

B)

9000

C)

8000

D)

7500

View Answer
42) The principle of LASER action involves

A)

amplification of particular frequency emitted by the system

B)

population inversion

C)

stimulated emission

D)

All of the above

View Answer
43) A ray of light is travelling from glass to air. (refractive index of glass = 1.5). The angle of incidence is 50°. The deviation of the ray is

A)

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

B)

\[{{80}^{0}}\]

C)

\[{{50}^{0}}-{{\sin }^{-1}}\left[ \frac{\sin {{50}^{0}}\,}{1.5} \right]\]

D)

\[{{\sin }^{-1}}\left[ \frac{sin{{50}^{0}}\,}{1.5} \right]-{{50}^{0}}\]

View Answer
44) When the angle of incidence is 60° on the surface of a glass slab, it is found that the reflected ray is completely polarised. The velocity of light in glass is

A)

\[\sqrt{2}\times {{10}^{8}}m{{s}^{-1}}\]

B)

\[\sqrt{3}\times {{10}^{8}}m{{s}^{-1}}\]

C)

\[2\times {{10}^{8}}m{{s}^{-1}}\]

D)

\[3\times {{10}^{8}}m{{s}^{-1}}\]

View Answer
45) The acceleration due to gravity becomes \[\left( \frac{g}{2} \right)\]g = acceleration due to gravity on the surface of the earth) at a height equal to

A)

4R

B)

R/4

C)

2R

D)

R/2

View Answer
46) A Carnot's engine operates with source at 127°C and sink at 27°C. If the source supplies 40 kJ of heat energy, the work done by the engine is

A)

30 kJ

B)

10 kJ

C)

4 kJ

D)

1 kJ

View Answer
47) The maximum particle velocity in a wave motion is half the wave velocity. Then the amplitude of the wave is equal to

A)

\[\frac{\lambda }{4\pi }\]

B)

\[\frac{2\lambda }{\pi }\]

C)

\[\frac{\lambda }{2\pi }\]

D)

\[\lambda \]

View Answer
48) An engine moving towards a wall with a velocity 50 ms-1 emits a note of 1.2 kHz. Speed of sound in air is 350 ms-1. The frequency of the note after reflection from the wall as heard by the driver of the engine is

A)

2.4kHz

B)

0.24kHz

C)

1.6kHz

D)

1.2kHz

View Answer
49) A glass tube is open at both the ends. A tuning fork of frequency \[f\]resonates with the air column inside the tube. Now the tube is placed vertically inside water so that half the length of the tube is filled with water. Now the air column inside the tube is in unison with another fork of frequency \[f\] '. Then

A)

\[f'=f\]

B)

\[f'=4f\]

C)

\[f'=2f\]

D)

\[f'=\frac{f}{2}\]

View Answer
50) In a reverse biased diode when the applied voltage changes by 1 V, the current is found to change by 0.5\[\mu A\]The reverse bias resistance of the diode is

A)

\[2\times {{10}^{5}}\Omega \]

B)

\[2\times {{10}^{6}}\Omega \]

C)

\[200\,\Omega \]

D)

\[2\,\,\Omega \]

View Answer
51) A bob of mass 10 kg is attached to wire 0.3 m long. Its breaking stress is \[4.8\times {{10}^{7}}N/{{m}^{2}}.\]The area of cross-section of the wire is 10-6 m2. The maximum angular velocity with which it can be rotated in a horizontal circle is

A)

8rad/s

B)

4rad/s

C)

2 rad/s

D)

1 rad/s

View Answer
52) Two bodies A and B have masses M and m respectively, where M > m and they are at a distance d apart. Equal force is applied to them so that they approach each other. The position where they hit each other is

A)

nearer to B

B)

nearer to A

C)

at equal distance from A and B

D)

Cannot be predicted

View Answer
53) Three particles, each of mass m gram are situated at the vertices of an equilateral triangle ABC of side \[l\] cm (as shown in the figure). The moment of inertia of the system about a line AX perpendicular to AB and in the plane of ABC, in gram-on2 units will be

A)

\[\frac{3}{4}m{{l}^{2}}\]

B)

\[2m{{l}^{2}}\]

C)

\[\frac{5}{4}m{{l}^{2}}\,\,\,\,\]

D)

\[\frac{3}{2}m{{l}^{2}}\,\,\,\,\]

View Answer
54) Two discs of moment of inertia \[{{I}_{1}}\] and \[{{I}_{2}}\]and angular speeds \[{{\omega }_{1}}\] and \[{{\omega }_{2}}\] are rotating along collinear axes passing through their centre of mass and perpendicular to their plane. If the two are made to rotate combindly along the same axis the rotational KE of system will be

A)

\[\frac{{{I}_{1}}{{\omega }_{1}}+{{I}_{2}}{{\omega }_{2}}}{2({{I}_{1}}+{{I}_{2}})}\]

B)

\[\frac{({{I}_{1}}+{{I}_{2}})\,{{({{\omega }_{1}}+{{\omega }_{2}})}^{2}}}{2}\]

C)

\[\frac{({{I}_{1}}\omega {{I}_{2}}+\,{{({{I}_{2}}{{\omega }_{2}})}^{2}}}{2({{I}_{1}}+{{I}_{2}})}\]

D)

None of these

View Answer
55) A rubber cord 10 m long is suspended vertically. How much does it strech under its own weight? (Density of rubber is \[1500\text{ }kg/{{m}^{3}},\] \[Y=5\times {{10}^{8}}N/{{m}^{2}},g=10\text{ }m/{{s}^{2}})\]

A)

\[15\times {{10}^{-4}}m\]

B)

\[7.5\times {{10}^{-4}}m\]

C)

\[12\times {{10}^{-4}}m\]

D)

\[25\times {{10}^{-4}}m\]

View Answer
56) A brass rod of cross-sectional area 1 cm2 and length 0.2 m is compressed lengthwise by a weight of 5 kg of Young's modulus of elasticity - of brass is \[1\times {{10}^{11}}N/{{m}^{2}}\]and \[g=10\text{ }m/{{s}^{2}},\]then increase in the energy of the rod will be'

A)

\[{{10}^{-5}}J\]

B)

\[2.5\times {{10}^{-5}}J\]

C)

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

D)

\[2.5\times {{10}^{-4}}J\]

View Answer
57)  The value of the gas constant (R) calculated from the perfect gas equation is 8.32 J/g mol-K, whereas its value calculated from the knowledge of \[{{C}_{p}}\] and \[{{C}_{v}}\] of the gas is 1.98 cal/g mol-K. From this data value of J is

A)

4.16J/cal

B)

4.18J/cal

C)

4.20J/cal

D)

4.22 J/cal

View Answer
58) The maximum force in addition to the weight required to pull a wire of 5.0 cm long from the surface of water at temperature 20°C, is 728 dyne. The surface tension of water is

A)

7.28 N/cm

B)

7.28 dyne/cm

C)

72.8 dyne/cm

D)

7.28 x102 dyne/cm

View Answer
59) If work done in increasing the size of a soap film from \[10cm\times 6cm\]to \[10cm\times 11cm\]is \[2\times {{10}^{-4}}J\]then surface tension is

A)

\[2\times {{10}^{-2}}N{{m}^{-1}}\]

B)

\[2\times {{10}^{-4}}N{{m}^{-1}}\]

C)

\[2\times {{10}^{-6}}N{{m}^{-1}}\]

D)

\[2\times {{10}^{-8}}N{{m}^{-1}}\]

View Answer
60) Through which mode of propagation, the radio waves can be sent from one place to another?

A)

Ground wave propagation

B)

Sky wave propagation

C)

Space wave propagation

D)

All of the above

View Answer
61) \[2S{{O}_{2}}(g)+{{O}_{2}}(g)\]is an example for

A)

neutralisation reaction

B)

homogeneous catalysis

C)

heterogeneous catalysis

D)

irreversible reaction

View Answer
62) Which one of the following is a second order reaction?

A)

\[{{H}_{2}}+B{{r}_{2}}\xrightarrow{{}}2HBr\]

B)

\[N{{H}_{4}}N{{O}_{3}}\xrightarrow{{}}{{N}_{2}}+3{{H}_{2}}O\]

C)

\[{{H}_{2}}+C{{l}_{2}}\xrightarrow{Sunlight}2HCl\]

D)

\[C{{H}_{3}}COOC{{H}_{3}}+NaOH\xrightarrow{{}}C{{H}_{3}}COONa\] \[+C{{H}_{3}}OH\]

View Answer
63) Denatured alcohol is

A)

ethanol + methanol

B)

rectified spirit + methanol + naphtha

C)

undistilled ethanol

D)

rectified spirit

View Answer
64) During the formation of a chemical bond

A)

electron-electron repulsion becomes more than the nucleus-electron attraction

B)

energy of the system does not change

C)

energy increases

D)

energy decreases

View Answer
65) \[+I\] effect is shown by

A)

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

B)

\[Br\]

C)

\[Cl\]

D)

\[N{{O}_{2}}\]

View Answer
66) Formation of coloured solution is possible when metal ion in the compound contains

A)

paired electrons

B)

lone pair of electrons

C)

unpaired electrons

D)

None of the above

View Answer
67) In the periodic table metals usually used as catalysts belong to

A)

\[f-\]block

B)

\[d-\]block

C)

\[p-\]block

D)

\[s-\]block

View Answer
68) Which of the following is an intensive property?

A)

Temperature

B)

Viscosity

C)

Surface tension

D)

All of these

View Answer
69) Hermann's bromamide reaction is used to convert

A)

acid to alcohol

B)

alcohol to acid

C)

amide to amine

D)

amine to amide

View Answer
70) In equilibrium state, the value of\[\Delta G\]is

A)

zero

B)

negative

C)

positive

D)

may be negative or positive

View Answer
71) How many chiral carbon atoms are present in 2,3, 4-trichloropentane?

A)

4

B)

1

C)

2

D)

3

View Answer
72) Molarity of a given orthophosphoric acid solution is 3 M. It's normality is

A)

9N

B)

0.3 N

C)

3 N

D)

1 N

View Answer
73) Hydroxyl ion concentration of\[{{10}^{-2}}M\text{ }HCl\]is

A)

\[1\times 101\text{ }mol\text{ }d{{m}^{-3}}\]

B)

\[1\times {{10}^{-12}}\text{ }mol\text{ }d{{m}^{-3}}\]

C)

\[1\times {{10}^{-1}}mol\text{ }d{{m}^{-3}}\]

D)

\[1\times {{10}^{-14}}mol\text{ }d{{m}^{-3}}\]

View Answer
74) In a neutron induced reaction of\[_{92}^{235}U,\]the product obtained is \[_{37}^{95}Rb,\]three neutrons and an element (new nuclide). The other new nuclide is

A)

\[_{55}^{138}Cs\]

B)

\[_{56}^{140}Ba\]

C)

\[_{54}^{144}Xe\]

D)

\[_{38}^{90}Sr\]

View Answer
75) Paracetamol is a/an

A)

antipyretic

B)

analgesic

C)

Both (a) and (b)

D)

antimalarial

View Answer
76) The electronic configuration of\[C{{r}^{3+}}\]is

A)

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

B)

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

C)

\[[Ar]\text{ }3{{d}^{2}}\text{ }4{{s}^{1}}\]

D)

\[[Ar]\text{ }3{{d}^{5}}\text{ }4{{s}^{1}}\]

View Answer
77) The lanthanide contraction is responsible for the fact that

A)

\[Zr\]and\[Zn\]have the same oxidation state

B)

\[Zr\]and\[Hf\]have about the same radius

C)

\[Zr\]and\[Nb\]have similar oxidation state

D)

\[Zr\]and Y have about the same radius

View Answer
78) Which of the following forms a colorless solution in aqueous medium?

A)

\[C{{r}^{3+}}\]

B)

\[{{V}^{3+}}\]

C)

\[S{{c}^{3+}}\]

D)

\[T{{i}^{3+}}\]

View Answer
79) When a sulphur sol is evaporated sulphur is obtained. On mixing with water sulphur sol is not formed. The sol is

A)

lyophilic

B)

reversible

C)

hydrophobic

D)

hydrophilic

View Answer
80) An alkyl halide reacts with alcoholic ammonia in a sealed tube, the product formed will be

A)

a primary amine

B)

a secondary amine

C)

a tertiary amine

D)

a mixture of all the three

View Answer
81) For a certain particle, it is found that uncertainty in velocity is reciprocal of uncertainty in position. This implies that

A)

mass of particle > unity

B)

mass of particle = unity

C)

mass of particle\[\le \]h

D)

mass of particle\[\ge h/4\pi \]

View Answer
82) Entropy of the universe is

A)

constant

B)

zero

C)

continuously decreasing

D)

continuously increasing

View Answer
83) Which one of the following salts on being dissolved in water gives\[pH>7\]at\[25{}^\circ C\]?

A)

\[KCN\]

B)

\[KN{{O}_{3}}\]

C)

\[N{{H}_{4}}Cl\]

D)

\[N{{H}_{4}}CN\]

View Answer
84) The reagent used in Clemmensen's reduction is

A)

conc\[{{H}_{2}}S{{O}_{4}}\]

B)

\[Zn-Hg\]/cone\[HCl\]

C)

aq\[KOH\]

D)

ale\[KOH\]

View Answer
85) The volume of 10 N and\[4\text{ }N\text{ }HCl\]required to make 1 L of\[7\text{ }N\text{ }HCl\] are

A)

0.50 L of\[10\text{ }N\text{ }HCl\]and 0.50 L of\[4\text{ }N\text{ }HCl\]

B)

0.60 L of\[10\text{ }N\text{ }HCl\]and 0.40 L of\[4\text{ }N\text{ }HCl\]

C)

0.80 L of\[10\text{ }N\text{ }HCl\]and 0.20 L of\[4\text{ }N\text{ }HCl\]

D)

0.75 L of\[10\text{ }N\text{ }HCl\]and 0.25 L of\[4\text{ }N\text{ }HCl\]

View Answer
86) Important ore of zinc is

A)

calamine

B)

cryolite

C)

zinc blende

D)

malachite

View Answer
87) Maximum number of molecules of\[C{{H}_{3}}I\]that can react with a molecule of\[C{{H}_{3}}N{{H}_{2}}\]are

A)

3

B)

4

C)

2

D)

1

View Answer
88) The relation between\[\Delta H\]and\[\Delta E\]is

A)

\[\Delta E=\Delta H+nRT\]

B)

\[\Delta H=\Delta E-\Delta nRT\]

C)

\[\Delta H=\Delta E+\Delta nRT\]

D)

\[\Delta E=\Delta H+\Delta nRT\]

View Answer
89) In which of the following process, maximum increase in entropy is observed?

A)

Melting of ice

B)

Sublimation of naphthalene

C)

Condensation of water

D)

Dissolution of salt in water

View Answer
90) The product formed when hydroxylamine condenses with a carbonyl compound is called

A)

hydrazide

B)

oxime

C)

hydrazine

D)

hydrazine

View Answer
91) Which of the following fibres is not made up of polyamides?

A)

Wool

B)

Natural silk

C)

Artificial silk

D)

Nylon

View Answer
92) The high oxidising power of fluorine is due to

A)

high electron affinity

B)

high heat of dissociation and low heat of hydration

C)

high heat of hydration and low heat of dissociation

D)

high heat of hydration and high heat of dissociation

View Answer
93) The basic structural unit and its geometry in silicates is

A)

\[Si{{O}_{2}},\] tetrahedral

B)

\[SiO_{4}^{4-},\]square planar

C)

\[Si{{O}_{2}},\]square planar

D)

\[SiO_{4}^{4-},\]tetrahedral

View Answer
94) Which of the following sets of quantum numbers is not possible?

A)

\[n=4,\text{ }l=1,\text{ }m=0,\text{ }s=+\frac{1}{2}\]

B)

\[n=4,\text{ }l=3,\text{ }m=-3,\text{ }s=-\frac{1}{2}\]

C)

\[n=4,\text{ }l=1,\text{ }m=+2,\text{ }s=-\frac{1}{2}\]

D)

\[n=4,\text{ }l=0,\text{ }m=0,\text{ }s=-\frac{1}{2}\]

View Answer
95) The\[{{t}_{0.5}}\]of a radioactive isotope is 1.5 h. How long will it take for its activity to be reduced to\[\frac{1}{16}\]of its original value?

A)

3.0 h

B)

360 min

C)

4.5 h

D)

600 min

View Answer
96) The atomic number of\[Ni\]and\[Cu\]are 28 and 29 respectively. The electronic configuration \[1{{s}^{2}},\text{ }2{{s}^{2}}\text{ }2{{p}^{6}},\text{ }3{{s}^{2}}\text{ }3{{p}^{6}}\text{ }3{{d}^{10}}\]represents

A)

\[C{{u}^{+}}\]

B)

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

C)

\[N{{i}^{2+}}\]

D)

\[Ni\]

View Answer
97) An example for autocatalysis is

A)

oxidation of NO to\[N{{O}_{2}}\]

B)

oxidation of\[S{{O}_{2}}\]to\[S{{O}_{3}}\]

C)

decomposition of\[KCl{{O}_{3}}\]to\[KCl\]and\[{{O}_{2}}\]

D)

oxidation of oxalic acid by acidified\[KMn{{O}_{4}}\]

View Answer
98) The reaction\[{{C}_{2}}HLONa+{{C}_{2}}{{H}_{5}}I\to {{C}_{2}}{{H}_{5}}O{{C}_{2}}{{H}_{5}}\]\[+\text{ }NaI\]is known as

A)

Kolbe's synthesis

B)

Wurtz's synthesis

C)

Williamson's synthesis

D)

Grignard's synthesis

View Answer
99) The highest magnetic moment is shown by the transition metal ion with the configuration

A)

\[3{{d}^{2}}\]

B)

\[3{{d}^{5}}\]

C)

\[3{{d}^{7}}\]

D)

\[3{{d}^{9}}\]

View Answer
100) A transition metal ion exists in its highest oxidation state. It is expected to behave as

A)

a chelating agent

B)

a central metal in a coordination compound

C)

an oxidising agent

D)

a reducing agent

View Answer
101) The concentration of a reactant X decreases from 0.1 M to 0.005 M in 40 min. If the reaction follows first order kinetics, the rate of the reaction when the concentration of X is 0.01 M will be

A)

\[1.73\times {{10}^{-4}}\,M\,{{\min }^{-1}}\]

B)

\[3.47\times {{10}^{-4}}\,M\,{{\min }^{-1}}\]

C)

\[3.47\times {{10}^{-5}}\,M\,{{\min }^{-1}}\]

D)

\[7.5\times {{10}^{-4}}\,M\,{{\min }^{-1}}\]

View Answer
102) Which of the following does not conduct electricity?

A)

Fused\[NaCl\]

B)

Solid\[NaCl\]

C)

Brine solution

D)

Copper

View Answer
103) When a quantity of electricity is passed through\[CuS{{O}_{4}}\]solution, 0.16 g of copper gets deposited. If the same quantity of electricity is passed through acidulated water, then the volume of\[{{H}_{2}}\]liberated at STP will be [Given: atomic weight of\[Cu=64\]]

A)

\[10c{{m}^{3}}\]

B)

\[56c{{m}^{3}}\]

C)

\[604c{{m}^{3}}\]

D)

\[8.0c{{m}^{3}}\]

View Answer
104) Solubility product of a salt AB is\[1\times {{10}^{-8}}{{M}^{2}}\]in a solution in which the concentration of\[{{A}^{+}}\]ions is\[{{10}^{-3}}M\]. The salt will precipitate when the concentration of\[{{B}^{-}}\]ions is kept

A)

between\[{{10}^{-8}}M\text{ }to\text{ }{{10}^{-7}}M\]

B)

between\[{{10}^{-7}}M\text{ }to\text{ }{{10}^{-8}}M\]

C)

\[>{{10}^{-5}}M\]

D)

\[>{{10}^{-8}}M\]

View Answer
105) Which one of the following condition will increase the voltage of the cell represented by the equation? \[Cu(s)+A{{g}^{+}}(aq)C{{u}^{2+}}(aq)+2Ag(s)\]

A)

Increase in the dimension of\[Cu\]electrode

B)

Increase in the dimension of\[Ag\]electrode

C)

Increase in the concentration of\[C{{u}^{2+}}\]ions

D)

Increase in the concentration of\[A{{g}^{+}}\]ions

View Answer
106) The pH of\[{{10}^{-8}}M\text{ }HCl\]solution is

A)

8

B)

more than 8

C)

between 6 and 7

D)

slightly more than 7

View Answer
107) The mass of glucose that should be dissolved in 50 g of water in order to produce the same lowering of vapour pressure as is produced by dissolving 1 g of urea in the same quantity of water is

A)

1 g

B)

3 g

C)

6g

D)

18 g

View Answer
108) Osmotic pressure observed when benzoic acid is dissolved in benzene is less than that expecteJcHrom theoretical considerations. This is because

A)

benzoic acid is an organic solute

B)

benzoic acid has higher molar mass than benzene

C)

benzoic acid gets associated in benzene

D)

benzoic acid gets dissociated in benzene

View Answer
109) For a reaction to be spontaneous at all temperatures,

A)

\[\Delta G\]and\[\Delta H\]should be negative

B)

\[\Delta G\]and\[\Delta H\]should be positive

C)

\[\Delta G=\Delta S=0\]

D)

\[\Delta H<\Delta G\]

View Answer
110) Which of the following electrolyte will have maximum flocculation value for\[Fe{{(OH)}_{3}}\]sol?

A)

\[NaCl\]

B)

\[N{{a}_{2}}S\]

C)

\[{{(N{{H}_{4}})}_{3}}P{{O}_{4}}\]

D)

\[{{K}_{2}}S{{O}_{4}}\]

View Answer
111) For a reversible reaction \[X(g)+3Y(g)2Z(g);\] \[\Delta H=-40\,kJ,\]the standard entropies of X, Y and Z are 60,40 and \[50\text{ }J{{K}^{-1}}mo{{l}^{-1}}\]respectively. The temperature at which the above reaction attains equilibrium is about

A)

400 K

B)

500 K

C)

273 K

D)

373 K

View Answer
112) Which of the following compounds is expected to be optically active?

A)

\[{{(C{{H}_{3}})}_{2}}CHCHO\]

B)

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

C)

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

D)

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

View Answer
113) The catalyst used in the preparation of an alkyi chloride by the action of dry\[HCl\]on an alcohol is

A)

anhydrous\[AlC{{l}_{3}}\]

B)

\[FeC{{l}_{3}}\]

C)

anhydrous\[ZnC{{l}_{2}}\]

D)

\[Cu\]

View Answer
114) In the reaction,\[R-X\xrightarrow{Alcoholic\text{ }KCN}A\xrightarrow{Dilute\text{ }HCl}B\] The product B is

A)

alkyl chloride

B)

aldehyde

C)

carboxylic acid

D)

ketone

View Answer
115) Which of the following compounds would not evolve\[C{{O}_{2}}\]when treated with\[NaHC{{O}_{3}}\]solution?

A)

Salicylic acid

B)

Phenol

C)

Benzoic add

D)

4-nitrobenzoic acid

View Answer
116) By heating phenol with chloroform in alkali, it is converted into

A)

salicylic acid

B)

salicylaldehyde

C)

anisole

D)

phenyl benzoate

View Answer
117) When a mixture of calcium benzoate and calcium acetate is dry distilled, the resulting compound is

A)

acetophenone

B)

benzaldehyde

C)

benzophenone

D)

acetaldehyde

View Answer
118) Glucose contains in addition to aldehyde group

A)

one secondary -OH and four primary -OH groups

B)

one primary -OH and four secondary -OH groups

C)

two primary -OH and three secondary -OH groups

D)

three primary -OH and two secondary -OH groups

View Answer
119) A distinctive and characteristic functional group of fats is

A)

a peptide group

B)

an ester group

C)

an alcoholic group

D)

a ketonic group

View Answer
120) For a reaction\[A+B\xrightarrow{{}}C+D\]if the concentration of A is doubled without alteming the concentration of B, the rate gets doubled. If the concentration of B is increased by nine times without alteming the concentration of A, the rate gets tripled. The order of the reaction is

A)

2

B)

1

C)

3/2

D)

4/3

View Answer
121) Who coined the term antibiotics?

A)

Woodruff

B)

Darwin

C)

Selman Waksman

D)

A Fleming

View Answer
122) A sponge harmful to oyster industry is

A)

Cliona

B)

Euspongia

C)

Hyalonema

D)

Spongilla

View Answer
123) During meiosis crossing over occurs at

A)

pachytene

B)

zygotene

C)

leptotene

D)

diakinesis

View Answer
124) The reabsorption of water in the kidney is under the control of

A)

LH

B)

      ADH

C)

STH

D)

ACTH

View Answer
125) Male Anopheles does not transmit malarial parasite because

A)

it catches fever

B)

it is too small to carry parasite

C)

the parasite is killed in its stomach

D)

it does not drink blood

View Answer
126) Ovulation takes place in a month between

A)

11-14 day

B)

14-16 day

C)

15-28 day

D)

21-26 day

View Answer
127) In sea anemone, the symmetry is

A)

radial

B)

bilateral

C)

spherical

D)

absent

View Answer
128) Which of following organ can be called a sort of "blood bank" ?

A)

Heart

B)

Spleen

C)

Liver

D)

Lungs

View Answer
129) The vital capacity of human being is about

A)

1200 mL

B)

4800 mL

C)

2400 mL

D)

3600 mL

View Answer
130) The hormone which stimulates constriction of gall bladder

A)

gastrin

B)

secretin

C)

glucagon

D)

cholecystokinin

View Answer
131) Which vitamin should not be stored?

A)

Calciferol

B)

Retinol

C)

Niacin

D)

Ascorbic acid

View Answer
132) The cranial capacity of Peking man was about

A)

900 cc

B)

1660 cc

C)

1075 cc

D)

1450 cc

View Answer
133) Eustachian canal connects

A)

middle ear with external ear

B)

middle ear with internal ear

C)

external ear with internal ear

D)

pharynx with middle ear

View Answer
134) Which compound has very important role in prebiodc evolution?

A)

\[S{{O}_{2}}\]

B)

\[NO\]

C)

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

D)

\[S{{O}_{3}}\]

View Answer
135) A man of 'A' blood group marries a woman of 'AB' blood group, which type of progeny would indicate that man is heterozygous?

A)

O

B)

B

C)

A

D)

AB

View Answer
136) The trisomy for 21st chromosome is called

A)

Down's syndrome

B)

Turner's syndrome

C)

Sickle cell anaemia

D)

Klinefelter's syndrome

View Answer
137) During emergency, which of the following hormone is secreted ?

A)

Aldosterone

B)

Thyroxine

C)

Adrenalin

D)

Calcitonin

View Answer
138) Which of the following is a transparent tissue?

A)

Tendon

B)

Fibrous cartilage

C)

Hyaline cartilage

D)

of the above

View Answer
139) Which of the following cell type is capable of giving rise to other cell types in sponges?

A)

Thesocytes

B)

Pinacocytes

C)

Cnidocytes

D)

Archaeocytes

View Answer
140) Vth cranial nerve of frog is called

A)

optic nerve

B)

vagus

C)

trigeminal

D)

ophthalmic

View Answer
141) The islets of Langerhans are found in

A)

pancreas

B)

stomach

C)

liver

D)

alimentary canal

View Answer
142) The vitamin which is essential for blood clotting is

A)

vitamin-A

B)

vitamin-B

C)

vitamin-C

D)

vitamin-K

View Answer
143) The female genital pore of Pheretima posthuma located upon the segment?

A)

14th

B)

16th

C)

18th

D)

15th

View Answer
144) Malpighian tubules are

A)

excretory organs of insects

B)

excretory organs of frog

C)

respiratory organs of insects

D)

endocrine glands of insects

View Answer
145) Pace-maker is

A)

AV node

B)

SA node

C)

Bundle of His

D)

Purkinje fibres

View Answer
146) The characteristic larva of     phylum Coelenterata is

A)

planula

B)

cysticercus

C)

rhabditiform

D)

wriggler

View Answer
147) In rabbit, head of epididymis present at the head of the testis is called

A)

vas deferens

B)

cauda epididymis

C)

gubemaculum

D)

caput epididymis

View Answer
148) In blood, \[C{{O}_{2}}\]is transported majorly as

A)

sodium carbonate

B)

carboxyhaemoglobin

C)

bicarbonate

D)

\[C{{O}_{2}}\]as such

View Answer
149) The embryo at 16 celled stage is known as

A)

morula

B)

gastrula

C)

blastula

D)

blastomere

View Answer
150) In which of the following, putrefying bacteria if present in?

A)

Intestine

B)

Colon

C)

Stomach

D)

Liver

View Answer
151) In Whittaker's system of classification,                 prokaryotes belong to the kingdom

A)

Monera

B)

Protista

C)

Animalia

D)

Fungi

View Answer
152) Which one of the following is a saprophytic bryophyte?

A)

Riccia fluitans

B)

Buxbaumia aphylla

C)

Funaria hygrometrica

D)

Sphagnum

View Answer
153) Iodine is obtained from

A)

Laminaria

B)

Chlorella

C)

Polysiphonia

D)

Porphyra

View Answer
154) Phloem parenchyma is absent in

A)

monocot stem

B)

dicot stem

C)

dicot root

D)

dicot leaf

View Answer
155) In CAM plants, \[C{{O}_{2}}\]acceptor is

A)

RuBP

B)

PEP

C)

OAA

D)

PGA

View Answer
156) Which one of the following is a natural growth inhibitor?

A)

NAA

B)

ABA

C)

IAA

D)

GA

View Answer
157) Which one is a short day plant?

A)

Brassica campestris

B)

Raphamus sativus

C)

Glycine max

D)

Papaver somniferum

View Answer
158) Ozone depletion in stratosphere would result in

A)

forest fires

B)

global warming

C)

skin cancer incidence

D)

None of the above

View Answer
159) Which of the following is a test cross?

A)

\[Tt\times tt\]

B)

\[TT\times tt\]

C)

\[Tt\times Tt\]

D)

\[tt\times tt\]

View Answer
160) Tetradynamous stamens are found in family

A)

Malvaceae

B)

Solanaceae

C)

Cruciferae

D)

Liliaceae

View Answer
161) 1:2:1 phenotypic and genotypic ratio is found in

A)

complementary genes

B)

blending inheritance

C)

multiple alleles

D)

pseudo alleles

View Answer
162) Decarboxylation is involved in

A)

electron transport system

B)

glycolysis

C)

Krebs' cycle

D)

lactic acid fermentation

View Answer
163) During meiosis crossing over occurs between which part of homologous chromosome ?

A)

Sister chromatids

B)

Non-sister chromatids

C)

Genes

D)

Alleles

View Answer
164) Stop codons are

A)

AUG.GUG

B)

UAA, UGA, UAG

C)

UAC, UGG

D)

AGU, AGA, UAC

View Answer
165) "Foolish seedling disease" of rice in Japan was caused by

A)

the deficiency of nitrogen

B)

a bacterium

C)

a fungus

D)

a virus

View Answer
166) Jumping genes in maize were discovered by

A)

Hugo de Vries

B)

Barbara McClintock

C)

T H Morgan

D)

Mendel

View Answer
167) Binomial system of nomenclature was given by

A)

Julian Huxley

B)

Bentham and Hooker

C)

Linnaeus

D)

Casper Bauhin

View Answer
168) Agar-agar is obtained from

A)

Chlorella

B)

Spirogyra

C)

Ulothrix

D)

Gelidium

View Answer
169) DNA multiplication is called

A)

translation

B)

replication

C)

transduction

D)

transcription

View Answer
170) In plants, water supply is due to

A)

osmosis

B)

imbibition

C)

guttation

D)

adhesion force

View Answer
171) Medicine for curing respiratory problems is obtained from

A)

Ephedra

B)

Calotropis

C)

Eucalyptus

D)

Cannabis

View Answer
172) In Funaria, stomata are present on the

A)

stem

B)

leaves

C)

capsule

D)

apophysis

View Answer
173) The process after glycolysis in anaerobic respiration is known as

A)

fermentation

B)

respiration

C)

Krebs' cycle

D)

decomposition

View Answer
174) In   cell cycle, during, which phase, chromosomes are arranged in equatorial plate ?

A)

Metaphase

B)

Anaphase

C)

Telophase

D)

Prophase

View Answer
175) Law of limiting factor was given by

A)

Leibig

B)

Blackman

C)

Calvin

D)

Arnon

View Answer
176) Cleavage polyembryony occurs in

A)

Pinus

B)

Mini Cycas

C)

Cycas

D)

Ephedra

View Answer
177) Late blight of potato is caused by

A)

Ustilago

B)

Pseudomonas

C)

Phytophthora infestans

D)

Colletotrichum falcatum

View Answer
178) Leaf abscission is caused by

A)

ABA

B)

cytokinin

C)

auxin

D)

gibberellins

View Answer
179) Most accepted theory for ascent of sap is

A)

capillarity theory

B)

root pressure theory

C)

pulsation theory

D)

transpiration pull theory

View Answer
180) Which enzyme converts glucose into alcohol?

A)

Zymase

B)

Diastase

C)

Invertase

D)

Lipase

View Answer