| 1)
If a body looses half of its velocity on penetrating 3 cm in a wooden block, then how
much will it penetrate more before coming to rest ?
|
|
|
a )
1 cm
|
|
b )
2 cm
|
|
c )
3 cm
|
|
d )
4 cm
|
| 2)
If two mirroRS are kept at 60° to each other, then the number of images
formed by them is
|
|
|
a )
5
|
|
b )
6
|
|
c )
7
|
|
d )
8
|
3)
The inductance between A and D
|
|
|
a )
3.66 H
|
|
b )
9 H
|
|
c )
0.66 H
|
|
d )
1 H
|
| 4)
Tube A has both ends open while tube B has one end closed, otherwise they are
identical. The ratio of fundamental frequency of tube A and B is
|
|
|
a )
1 : 2
|
|
b )
1 : 4
|
|
c )
2 : 1
|
|
d )
4 : 1
|
5)
A charged particle q is placed at the centerO of cube of length L (ABCDEFGH).
Another same charge q is placed at a distance L from O. Then the electron flux
emerging from q at O is
|
|
|
a )
q/ε0
|
|
b )
zero
|
|
c )
q/(2πε0L)
|
|
d )
q/(3πε0L)
|
| 6)
A ball whose kinetic energy is E, is projected at an angle 45°
to the horizontal. The kinetic energy of the ball at the highest point of its flight will be
|
|
|
a )
E
|
b )
E/
|
|
c )
E/2
|
|
d )
zero
|
| 7)
If 13.6 eV energy is required to ionize the hydrogen atom, then the energy required
to remove an electron from n = 2 is
|
|
|
a )
10.2 eV
|
|
b )
0 eV
|
|
c )
3.4 eV
|
|
d )
6.8 eV
|
| 8)
On moving charge of 20 coulomb by 2 cm, 2 J of work is done, then the potential
difference between the points is
|
|
|
a )
0.1 V
|
|
b )
8 V
|
|
c )
2 eV
|
|
d )
0.5 V
|
| 9)
If a current is passed through a spring then the spring will
|
|
|
a )
expand
|
|
b )
compress
|
|
c )
remains same
|
|
d )
none of these
|
| 10)
A tuning fork arrangement (pair) produces 4 beats/sec with one fork of frequency 288 cps.
A little wax is placed on the unknown fork and it then produces 2 beats/sec. The frequency
of the unknown fork is
|
|
|
a )
286 cps
|
|
b )
292 cps
|
|
c )
294 cps
|
|
d )
288 cps
|
| 11)
If an ammeter is to be used in place of a voltmeter. then we must connect with the ammeter a
|
|
|
a )
low resistance in parallel
|
|
b )
high resistance in parallel
|
|
c )
high resistance in series
|
|
d )
low resistance in series
|
| 12)
Wavelength of light uses in an optical instrument are λ1 = 4000 Å
and λ2 = 5000 Å , then ratio of their respective resolving powers
(corresponding to λ1 and λ2 is
|
|
|
a )
16 : 25
|
|
b )
9 : 1
|
|
c )
4 : 5
|
|
d )
5 : 4
|
| 13)
A wave y = a sin(ωt - kx) on a string meets with an another wave producing a node at x = 0.
Then the equation of the unknown wave is
|
|
|
a )
y = a sin(ωt + kx)
|
|
b )
y = - a sin(ωt + kx)
|
|
c )
y = a sin(ωt - kx)
|
|
d )
y = - a sin(ωt - kx)
|
| 14)
From a building two balls A and B are thrown such that A is thrown upwards and B downwards (both
vertically with same speed). If VA and VB are their respective velocities on
reaching the ground, then
|
|
|
a )
VB > VA
|
|
b )
VA = VB
|
|
c )
VA > VB
|
|
d )
their velocities depends on their masses
|
| 15)
If suddenly the gravitational force of attraction between earth and a satellite revolving around
it becomes zero, then the satellite will
|
|
|
a )
continue to move in its orbit with same velocity
|
|
b )
move tangentially to the original orbit in the same velocity
|
|
c )
become stationary in its orbit
|
d )
|
| 16)
If an electron and a proton having same momenta enter perpendicular to a magnetic
field, then
|
|
|
a )
curved path of electron and proton will be same (ignoring the sense of revolution)
|
|
c )
they will move undeflected
curved path of electron is more curved than that of proton
|
|
d )
path of proton is more curved
|
| 17)
Electromagnetic waves are transverse in nature is evident by
|
|
|
a )
polarisation
|
|
b )
interference
|
|
c )
reflection
|
|
d )
diffraction
|
| 18)
Which of the following is used in optical fibres ?
|
|
|
a )
Total internal reflection
|
|
b )
interference
|
|
c )
reflection
|
|
d )
diffraction
|
| 19)
Which of the following is more close to a black body ?
|
|
|
a )
Black board paint
|
|
b )
Green leaves
|
|
c )
Black holes
|
|
d )
Red roses
|
| 20)
Which of the following are not electromagnetic waves
|
|
|
a )
Cosmic rays
|
|
b )
γ - rays
|
|
c )
β - rays
|
|
d )
X - rays
|
| 21)
If a circular coil A of radius R , current i is flowing and in another coil
B of radius 2R , current 2i is flowing, then the ratio of the magnetic fields
BA and BB produced by them will be
|
|
|
a )
1
|
|
b )
2
|
|
c )
1/2
|
|
d )
4
|
22)
If the in the circuit , power dissipation is 150 W , then R is
|
|
|
a )
2 Ω
|
|
b )
6 Ω
|
|
c )
5 Ω
|
|
d )
4 Ω
|
| 23)
Energy required to move a body of mass m from an orbit of radius 2R to 3R is
|
|
|
a )
GMm / 12R2
|
|
b )
GMm / 3R2
|
|
c )
GMm / 8R
|
|
d )
GMm / 6R
|
| 24)
If θi is the inversion temperature, θn is the neutral
temperature , θc is the temperature of the cold junction then
|
|
|
a )
θi + θc = θn
|
|
b )
θi - θc = 2θn
|
|
c )
(θi + θc) / 2 = θn
|
|
d )
θc - θi = 2θn
|
| 25)
Which statement is incorrect ?
|
|
|
a )
All reversible cycles have same efficiency
|
|
b )
Reverisible cycle have more efficiency than an irreversible one
|
|
c )
Carnot cycle is reversible one
|
|
d )
Carnot cycle has the maximum efficiency in all cycles
|
| 26)
Two identical particles move towards each other with velocity 2v and v respectively.
The velocity of the center of mass is
|
|
|
a )
v
|
|
b )
v/3
|
|
c )
v/2
|
|
d )
zero
|
| 27)
By increasing the temperature , the specific resistance of a conductor and a semiconductor
|
|
|
a )
increases for both
|
|
b )
decreases for both
|
|
c )
increases, decreases
|
|
d )
decreases , increases
|
| 28)
Cooking gas containers are kept in a lorry moving with uniform speed. The temperature of the gas
molecules inside will
|
|
|
a )
increase
|
|
b )
decrease
|
|
c )
remain same
|
|
d )
decrease for some , while increase for other
|
| 29)
Identify the pair whose dimensions are equal
|
|
|
a )
torque and work
|
|
b )
stress and energy
|
|
c )
force and stress
|
|
d )
force and work
|
| 30)
The kinetic energy needed to project a body of mass m from the earth surface (radius R) to infinity
is
|
|
|
a )
m g R / 2
|
|
b )
2 m g R
|
|
c )
m g R
|
|
d )
m g R / 4
|
| 31)
Heat given to a body which raises its temperature by 1° C is
|
|
|
a )
water equivalent
|
|
b )
thermal capacity
|
|
c )
specific heat
|
|
d )
temperature gradient
|
| 32)
If there are n capacitors , each of capacity C , connected in parallel to V volt
source , then the energy stored is equal to
|
|
|
a )
CV
|
|
b )
(1/2)nCV2
|
|
c )
CV2
|
|
d )
(1/2n)CV2
|
| 33)
When temperature increases , the frequency of the tuning fork
|
|
|
a )
increases
|
|
b )
decreases
|
|
c )
remains same
|
|
d )
increases or decreases depending on the material
|
| 34)
If a spring has time period T , and is cut into n equal parts , then the time period
of each part will be
|
|
a )
T
|
|
b )
T/
|
|
c )
nT
|
|
d )
T
|
| 35)
At absolute zero Si acts as
|
|
|
a )
non-metal
|
|
b )
metal
|
|
c )
insulator
|
|
d )
non of these
|
| 36)
Infrared radiation is detected by
|
|
|
a )
spectrometer
|
|
b )
pyrometer
|
|
c )
nanometer
|
|
d )
photometer
|
| 37)
Length of string tied to two rigid supports is 40 cm. Maximum length (wavelength in cm)
of a stationary wave produced on it is
|
|
|
a )
20
|
|
b )
80
|
|
c )
40
|
|
d )
120
|
| 38)
If N0 is the original mass of the substance of half-life period
t1/2 = 5 years, then the amount of substance left after 15 years is
|
|
|
a )
N0/8
|
|
b )
N0/16
|
|
c )
N0/2
|
|
d )
N0/4
|
| 39)
The escape velocity of a body depends upon mass as
|
|
|
a )
m0
|
|
b )
m1
|
|
c )
m2
|
|
d )
m3
|
| 40)
If mass-energy equivalence is taken into account,
when water is cooled to form ice, the mass of ice obtained is
|
|
|
a )
more
|
|
b )
unchanged
|
|
c )
less
|
|
d )
may increase or decrease
|
| 41)
In a simple harmonic oscillator, at the mean position
|
|
|
a )
kinetic energy is minimum, potential energy is maximum
|
|
b )
both kinetic and potential energies are maximum
|
|
c )
kinetic energy is maximum, potential energy is minimum
|
|
d )
both kinetic and potential energies are minimum
|
| 42)
The power factor of an A.C. circuit having resistance (R) and inductance (L)
connected in series and an angular velocity ω is
|
|
|
a )
R/(ωL)
|
|
b )
R/( R2 + ω2L2 )1/2
|
|
c )
(ωL)/R
|
|
d )
R/( R2 - ω2L2 )1/2
|
| 43)
An astronomical telescope has a large aperture to
|
|
|
a )
reduce spherical aberration
|
|
b )
have high resolution
|
|
c )
increase span of observation
|
|
d )
have low dispersion
|
| 44)
A spring of force constant 800 N/m has an extension of
5 cm. The work done in extending it from 5 cm to 15
cm is
|
|
|
a )
16 J
|
|
b )
8 J
|
|
c )
32 J
|
|
d )
24 J
|
| 45)
The part of a transistor which is most heavily doped to
produce large number of majority carriers is
|
|
|
a )
emitter
|
|
b )
base
|
|
c )
collector
|
|
d )
can be any of the above three
|
| 46)
At what temperature is the r.m.s. velocity of a hydrogen molecule
equal to that of an oxygen molecule at 47°C
|
|
|
a )
80 K
|
|
b )
- 73 K
|
|
c )
3 K
|
|
d )
20 K
|
| 47)
A lift is moving down with acceleration a. A man in
the lift drops a ball inside the lift. The acceleration of
the ball as observed by the man in the lift and a man standing
stationary on the ground are respectively
|
|
|
a )
g , g
|
|
b )
g - a , g - a
|
|
c )
g - a , a
|
|
d )
a , g
|
| 48)
The energy band gap is maximum in
|
|
|
a )
metals
|
|
b )
superconductors
|
|
c )
insulators
|
|
d )
semiconductors
|
| 49)
A solid sphere, a hollow sphere and a ring are released
from top of an inclined plane (frictionless) so that they
slide down the plane. Then maximum acceleration
down the plane is for (no rolling)
|
|
|
a )
solid sphere
|
|
b )
hollow sphere
|
|
c )
ring
|
|
d )
all same
|
| 50)
Even Carnot engine cannot give 100% efficiency because we cannot
|
|
|
a )
prevent radiation
|
|
b )
find ideal sources
|
|
c )
reach absolute zero temperature
|
|
d )
eliminate friction
|
| 51)
A light string passing over a smooth light pulley connects
two blocks of masses m1 and m2 (vertically). If
the acceleration of the system is g/8, then the ratio of
the masses is
|
|
|
a )
8 : 1
|
|
b )
9 : 7
|
|
c )
4 : 3
|
|
d )
5 : 3
|
| 52)
Capacitance (in F) of a spherical conductor with radius 1 m is
|
|
|
a )
1.1 x 10-10
|
|
b )
10-6
|
|
c )
9 X 10-9
|
|
d )
10-3
|
| 53)
Two forces are such that the sum of their magnitudes
is 18 N and their resultant is perpendicular to the
smaller force. Then the magnitudes of the forces are
|
|
|
a )
12 N , 6 N
|
|
b )
13 N , 5 N
|
|
c )
10 N , 8 N
|
|
d )
16 N , 2 N
|
| 54)
A cylinder of height 20 m is completely filled with water.
The velocity of efflux of water (in ms-1) through a
small hole on the side wall of the cylinder near its bottom is
|
|
|
a )
10 m/s
|
|
b )
20 m/s
|
|
c )
25.5 m/s
|
|
d )
5 m/s
|
| 55)
Initial angular velocity of a circular disc of mass M is
ω1 .
Then two small spheres of mass m are attached gently to two
diametrically opposite points on the edge
of the disc. What is the final angular velocity of the
disc?
|
|
|
a )
|
|
b )
|
|
c )
|
|
d )
|
| 56)
Moment of inetia of a circular wire of mass M and radius R about is diameter is
|
|
|
a )
M R2/2
|
|
b )
M R2
|
|
c )
2 M R2
|
|
d )
M R2/4
|
| 57)
1 mole of a gas with γ = 7/5 is mixed with 1 mole of a gas with
γ = 5/3 ; then the value of γ for the resulting mixture is
|
|
|
a )
3/2
|
|
b )
2/5
|
|
c )
24/16
|
|
d )
12/7
|
| 58)
Two spheres of the same material have radii 1 m and
4 m and temperatures 4000 K and 2000 K respectively.
The ratio of the energy radiated per second by the first
sphere to that by the second is
|
|
|
a )
1 : 1
|
|
b )
16 : 1
|
|
c )
4 : 1
|
|
d )
1 : 9
|
59)
Three identical blocks of masses m = 2 kg
are drawn by a force F = 10.2 N on a frictionless surface,
then what is the tension (in N) in the string between the blocks B and C ?
|
|
|
a )
9.2
|
|
b )
8
|
|
c )
3.4
|
|
d )
9.8
|
| 60)
When forces F1, F2, F3 are acting on a particle
of mass m such that F2 and F3 are mutually perpendicular,
then the particle remains stationary. If the force F1 is now removed
then the acceleration of the particle is
|
|
|
a )
F1/m
|
|
b )
(F2 F3)/(m F1)
|
|
c )
(F2 - F1)/m
|
|
d )
F2/m
|
| 61)
A child swinging on a swing in sitting position, stands
up, then the time period of the swing will
|
|
|
a )
increase
|
|
b )
decrease
|
|
c )
remain same
|
|
d )
increases if the child is long and decreases if the child is short
|
62)
One end of massless rope, which passes over a massless and frictionless pulley P
is tied to a hook C while the other end is free. Maximum tension that the rope
can bear is 360 N. With what value of maximum safe acceleration (in ms-2)
can a man of 60 kg climb down the rope ?
|
|
|
a )
16
|
|
b )
6
|
|
c )
4
|
|
d )
8
|
| 63)
Speeds of two identical cars are u and 4u at a specific instant.
The ratio of the respective distances in which the two cars are
stopped from that instant is
|
|
|
a )
1 : 1
|
|
b )
1 : 4
|
|
c )
1 : 8
|
|
d )
1 : 16
|
| 64)
The mass of a product liberated on anode in an
electrochemical cell depends on
(where t is the time period for which the current is passed)
|
|
|
a )
( I t )1/2
|
|
b )
I t
|
|
c )
I / t
|
|
d )
I2 t
|
| 65)
The minimum velocity (in ms-1) with which a car driver must traverse
a flat curve of radius 150 m and coefficient of friction 0.6 to avoid skidding is
|
|
|
a )
60
|
|
b )
30
|
|
c )
15
|
|
d )
25
|
66)
A particle of mass m moves along line PC with velocity v as shown.
What is the angular momentum of the particle about P?
|
|
|
a )
m v L
|
|
b )
m v l
|
|
c )
m v r
|
|
d )
zero
|
67)
At a specific instant emission of radioactive compound is deflected in a magnetic field.
The compound can emit
(i) electrons
(ii) protons
(iii) He2+
(iv) neutrons
|
|
|
a )
(i), (ii) , (iii)
|
|
b )
(i), (ii) (iii), (iv)
|
|
c )
(iv)
|
|
d )
(ii), (iii)
|
68)
A conducting square loop of side L and resistance R moves in its place with a
uniform velocity v perpendicular to one of its sides. A
magnetic induction B constant in time and space, pointing
perpendicular and into the plane at the loop exists
everywhere with half the loop outside the field, as shown
in figure. The induced e.m.f. is
|
|
|
a )
zero
|
|
b )
R v B
|
|
c )
v B l/R
|
|
d )
v B l
|
| 69)
If a charge q is placed at the centre of the line joining two equal charges Q
such that the system is in equilibrium then the value of q is
|
|
|
a )
Q/2
|
|
b )
- Q/2
|
|
c )
Q/4
|
|
d )
- Q/4
|
70)
Wires 1 and 2 carrying currents i1 and i2 respectively
are inclined at an angle 0 to each other. What is the force on a small element dl of wire 2
at a distance of r from wire 1 (as shown in figure) due to the magnetic field of wire 1 ?
|
|
|
a )
|
|
b )
|
|
c )
|
|
d )
|
| 71)
Sodium and copper have work functions 2.3 eV and
4.5 eV respectively. Then the ratio of the wavelengths
is nearest to
|
|
|
a )
1 : 2
|
|
b )
4 : 1
|
|
c )
2 : 1
|
|
d )
1 : 4
|
| 72)
Formation of covalent bonds in compounds exhibits
|
|
|
a )
wave nature of electron
|
|
b )
particle nature of electron
|
|
c )
both wave and particle nature of electron
|
|
d )
none of these
|
| 73)
In a transformer, number of turns in the primary are
140 and that in the secondary are 280. If current in
primary is 4 A, then that in the secondary is
|
|
|
a )
4 A
|
|
b )
2 A
|
|
c )
6 A
|
|
d )
10 A
|
| 74)
The time period of a charged particle undergoing a circular
motion in a uniform magnetic field is independent of its
|
|
|
a )
speed
|
|
b )
mass
|
|
c )
charge
|
|
d )
magnetic induction
|
| 75)
A wire when connected to 220 V mains supply has
power dissipation P1. Now the wire is cut into two equal
pieces which are connected in parallel to the same supply.
Power dissipation in this case is P. Then P2 : P1 is
|
|
|
a )
1
|
|
b )
4
|
|
c )
2
|
|
d )
3
|
| 76)
Which of the following is a redox reaction?
|
|
|
a )
(a) NaC1 + KNO3 → NaNO3 + KCl
|
|
b )
(b) CaC2O4 + 2HCl → CaCl2 + H2C2O4
|
|
c )
(c) Ca(OH)2 + 2NH4Cl → CaCl2 + 2NH3 + 2H2O
|
|
d )
(d) 2K[Ag(CN)2] + Zn → 2Ag + K2 [Zn(CN)4]
|
| 77)
For an ideal gas, number of mol per litre in terms of its pressure P, temperature T and gas constant R is
|
|
|
a )
|
b )
P R T
|
|
c )
|
|
d )
|
| 78)
Number of P-O bonds in P4O10 is
|
|
|
a )
17
|
|
b )
16
|
|
c )
15
|
|
d )
6
|
| 79)
KO2 is used in space and submarines because it
|
|
|
a )
absorbs CO2 and increases O2 concentration
|
|
b )
absorbs moisture
|
|
c )
absorbs CO2
|
|
d )
produces ozone
|
| 80)
Which of the following ions has the maximum magnetic moment?
|
|
|
a )
Mn2+
|
|
b )
Fe2+
|
|
c )
Ti2+
|
|
d )
Cr2+
|
| 81)
Acetylene does not react with
|
|
|
a )
Na
|
|
b )
ammonical AgNO3
|
|
c )
Hcl
|
|
d )
NaOH
|
82)
Compound A given below is
|
|
|
a )
antiseptic
|
|
b )
antibiotic
|
|
c )
analgesic
|
|
d )
pesticide
|
83)
For the following cell with hydrogen electrodes at two different pressures p1 and p2
|
Pt(H2)
|
H+ (aq.)
|
Pt(H2)
|
|
p1
|
1M
|
p2
|
emf is given by
|
|
|
a )
|
|
b )
|
|
c )
|
|
d )
|
| 84)
Acetylene reacts with hypochiorous acid to form
|
|
|
a )
Cl2CHCHO
|
|
b )
ClCH2COOH
|
|
c )
CH2COCl
|
|
d )
ClCH2CHO.
|
| 85)
On heating benzyl amine with chloroform and ethanolic
KOH, the product obtained is
|
|
|
a )
benzyl alcohol
|
|
b )
benzaldehyde
|
|
c )
benzonitrile
|
|
d )
benzyl isocyanide.
|
| 86)
Which of the following reaction is possible at anode?
|
|
|
a )
F2 + 2e- → 2F-
|
|
b )
2H+ + 1/2 O2 + 2 e- → H2O
|
|
c )
2Cr23+ + 7H2O → Cr2O72- + 14H+ + 6e-
|
|
d )
Fe2+ → Fe3+ + e-
|
| 87)
Which of the following concentration factor is affected by change in temperature?
|
|
|
a )
molarity
|
|
b )
molality
|
|
c )
mol fraction
|
|
d )
weight fraction
|
| 88)
Cyanide process is used for the extraction of
|
|
|
a )
barium
|
|
b )
silver
|
|
c )
boron
|
|
d )
zinc
|
89)
Following reaction
(CH3)3CBr + H2O → (CH3)3COH + HBr
is an example of
|
|
|
a )
elimination reaction
|
|
b )
free radial substitution
|
|
c )
nucleophilic substitution
|
|
d )
electrophiic substitution
|
| 90)
A metal M forms water soluble MSO4 and inert MO. MO in aqueous solution forms insoluble
M(OH)2 soluble in NaOH. Metal M is
|
|
|
a )
Be
|
|
b )
Mg
|
|
c )
Ca
|
|
d )
Si
|
| 91)
Half life of a substance A following first order kinetics is 5 days.
Starting with 100 g of A, amount left after 15 days is
|
|
|
a )
25 g
|
|
b )
50 g
|
|
c )
12.5 g
|
|
d )
6.25 g
|
| 92)
The most stable ion is
|
|
|
a )
[Fe(OH)5]3-
|
|
b )
[FeCl6]3-
|
|
c )
[Fe(CN)6]3-
|
|
d )
[Fe(H2O)6]3-
|
| 93)
A substance forms zwitter ion. It can have functional groups
|
|
|
a )
-NH2 , -COOH
|
|
b )
-NH2 , -SO3H
|
|
c )
both (a) and (b)
|
|
d )
none of these.
|
| 94)
If Fe3+ and Cr3+ both are present in group III of qualitative analysis,
then distinction can be made by
|
|
|
a )
addition of NH4OH in presence of NH4Cl when only Fe(OH)3 is precipitated
|
|
b )
addition of NH4OH in presence of NH2Cl when Cr(OH)3 and
Fe(OH)3 both are precipitated and on adding Br2 water and
NaOH, Cr(OH)3 dissolves
|
|
c )
precipitate of Cr(OH)3 and Fe(OH)3 as obtained in (b) are treated
with conc. HCl when only Fe(OH)3 dissolves
|
|
d )
(b) and (c) are correct
|
| 95)
In an organic compound of molar mass 108 g mol-1 C, H and N atoms are present in
9 : 1 : 3.5 by weight. Molecular formula can be
|
|
|
a )
C6H8N2
|
|
b )
C7H10N
|
|
c )
C5H6N3
|
|
d )
C4H18N3
|
| 96)
Solubility of Ca(OH)2 is S mol litre-1 .
The solubility product (K) under the same condition is
|
|
|
a )
4 S3
|
|
b )
3 S4
|
|
c )
4 S2
|
|
d )
S3
|
| 97)
Heat required to raise the temperature of 1 mol of a substance by 1° is called
|
|
|
a )
specific heat
|
|
b )
molar heat capacity
|
|
c )
water equialent
|
|
d )
specific gravity
|
| 98)
β-particle is emitted in a radioactive reaction when
|
|
|
a )
a proton changes to neutron
|
|
b )
a neutron changes to proton
|
|
c )
a neutron changes to electron
|
|
d )
an electron changes to neutron
|
| 99)
In a mixture of A and B, components show negative deviation when
|
|
|
a )
A-B interaction is stronger than A-A and B-B interaction
|
|
b )
A-B interaction is weaker than A-A and B-B interaction
|
|
c )
ΔVmix > 0, ΔSmix > 0
|
|
d )
ΔVmix = 0, ΔSmix > 0
|
| 100)
Refining of impure copper with zinc impurity is to be done by electrolysis using electrons as
|
|
a )
|
Cathode
|
Anode
|
|
pure copper
|
pure zinc
|
|
b )
|
Cathode
|
Anode
|
|
pure zinc
|
pure copper
|
|
c )
|
Cathode
|
Anode
|
|
pure copper
|
impure copper
|
|
d )
|
Cathode
|
Anode
|
|
pure zinc
|
impure zinc
|
|
| 101)
Aluminium is extracted by the electrolysis of
|
|
|
a )
alumina
|
|
b )
bauxite
|
|
c )
molten cryolite
|
|
d )
alumina mixed with molten cryolite
|
| 102)
For an aqueous solution, freezing point is - 0186°C.
Elevation of the boiling point of the same solution is
(Kf = 1.86° mol-1 kg and Kb = 0.512° mol-1 kg)
|
|
|
a )
0.186°
|
|
b )
0.0512°
|
|
c )
1.86°
|
|
d )
5.12°
|
| 103)
Underlined carbon is sp3 hybridised in
|
|
|
a )
CH3CH = CH2
|
|
b )
CH3CH2NH2
|
|
c )
CH3CONH2
|
|
d )
CH3CH2CN
|
| 104)
Bond angle of 109°28' is found in
|
|
|
a )
NH3
|
|
b )
H2O
|
|
c )
+CH3
|
|
d )
+NH4
|
105)
For a reaction, A + 2B → C , rate is given by
+ d[C]/dt = k[A][B] , hence the order of the reaction is
|
|
|
a )
3
|
|
b )
2
|
|
c )
1
|
|
d )
0
|
| 106)
CH3MgI is an organometallic compound due to
|
|
|
a )
Mg-I bond
|
|
b )
C-I bond
|
|
c )
C-Mg bond
|
|
d )
C-H bond
|
| 107)
One of the following species acts as both Bronsted acid and base
|
|
|
a )
H2PO2-
|
|
b )
HPO32-
|
|
c )
HPO42-
|
|
d )
all of the above
|
| 108)
AlH3 changes to AlH4-
|
|
|
a )
H2O changes to H3O+
|
|
b )
NH3 changes to NH4-
|
|
c )
HPO42-
|
|
d )
in all cases
|
| 109)
Racemic mixture is formed by mixing two
|
|
|
a )
isomeric compounds
|
|
b )
chiral compounds
|
|
c )
meso compounds
|
|
d )
enantiomers with chiral carbon
|
| 110)
The number of lone pairs on Xe in XeF2, XeF4 and XeF6 respectively are
|
|
|
a )
3 , 2 , 1
|
|
b )
2 , 4 , 6
|
|
c )
1 , 2 , 3
|
|
d )
6 , 4 , 2
|
| 111)
An aqueous solution of 1M NaCl and 1M HCl is
|
|
|
a )
not a buffer but pH < 7
|
|
b )
not a buffer but pH > 7
|
|
c )
a buffer with pH < 7
|
|
d )
a buffer with pH > 7
|
112)
Consider following two reactions
A → Product; - d[A]/dt = k1 [A]°
B → Product; - d[B]/dt = k2 [B]
k1 and k2 are expressed in terms of molarity
(mol L-1) and time (sec-1) as
|
|
|
a )
sec-1 , M sec-1
|
|
b )
M sec-1 , M sec-1
|
|
c )
sec-1 , M-1 sec-1
|
|
d )
M sec-1 , sec-1
|
| 113)
RNA contains
|
|
|
a )
ribose sugar and thymine
|
|
b )
ribose sugar and uracil
|
|
c )
deoxyribose sugar and uracil
|
|
d )
deoxyribose sugar and thymine
|
114)
For a cell given below ,
|
Ag
|
|
|
Ag+
|
|
|
|
|
Cu2+
|
|
|
Cu
|
|
(-)
|
(+)
|
|
Ag+ + e- → Ag , E° = x
|
|
Cu2+ + 2e- → Cu , E° = y
|
E° cell is
|
|
|
a )
x + 2y
|
|
b )
2x + y
|
|
c )
y - x
|
|
d )
y - 2x
|
| 115)
Based on kinetic theory of gases following laws can be
proved
|
|
|
a )
Boyle's law
|
|
b )
Charle's law
|
|
c )
Avogadro's law
|
|
d )
all of these
|
116)
MnO4- is a good oxidising agent in different medium
changing to
|
MnO4-
|
→
|
Mn2+
|
|
|
→
|
MnO42-
|
|
|
→
|
MnO2
|
|
|
→
|
Mn2O3
|
changes in oxidation number respectively are:
|
|
|
a )
1, 3, 4, 5
|
|
b )
5, 4, 3, 2
|
|
c )
5 , 1 , 3 , 4
|
|
d )
2 , 6 , 4 , 3
|
| 117)
For the reaction : H2 + I2 → 2 HI the differential rate law is
|
|
|
a )
- d[H2]/dt = - d[I2]/dt = 2 d[HI]/dt
|
|
b )
- 2d[H2]/dt = - 2d[I2]/dt = d[HI]/dt
|
|
c )
- d[H2]/dt = - d[I2]/dt = d[HI]/dt
|
|
d )
- d[H2]/(2dt) = - d[I2]/(2dt) = d[HI]/dt
|
| 118)
Number of atoms is 560 g of Fe (atomic mass =
56 g mol-1) is
|
|
|
a )
is twice that of 70 gN
|
|
b )
is half that of 20 gH
|
|
c )
- d[H2]/dt = - d[I2]/dt = d[HI]/dt
|
|
d )
none is correct
|
| 119)
Geometrical isomerism is not shown by
|
|
|
a )
1, 1-dichloro-1-pentene
|
|
b )
1, 2-dichloro-1-pentene
|
|
c )
1, 3-dichloro-2-penene
|
|
d )
1, 4-dichloro-2-pentene
|
| 120)
Number of atoms in the unit cell of Na (BCC type crystal) and Mg (FCC type crystal) are respectively
|
|
|
a )
4 , 4
|
|
b )
4 , 2
|
|
c )
2 , 4
|
|
d )
1 , 1
|
| 121)
Which of the following compounds has incorrect HIPAC
nomenclature?
|
|
a )
|
b )
|
c )
|
d )
|
122)
End product of the following reaction is
|
|
a )
|
b )
|
|
c )
CH2=CHCOOH
|
d )
|
123)
For the following reaction in gaseous phase
CO + 1/2 O2 → CO2
Kc/Kp is
|
|
|
a )
(RT)1/2
|
|
b )
(RT)-1/2
|
|
c )
RT
|
|
d )
(RT)-1
|
| 124)
Energy of H-atom in the ground state is - 13.6 eV,
hence energy in the second excited state is
|
|
|
a )
-6.8 eV
|
|
b )
-3.4 eV
|
|
c )
-1.51 eV
|
|
d )
-4.53 eV
|
| 125)
A square planar complex is formed by hybridisation of
the following atomic orbitals
|
|
|
a )
s, px , py , pz
|
|
b )
s, px , py , pz , d
|
|
c )
d , s , px , py
|
|
d )
s, px , py , pz , d , d
|
126)
Type of isomerism shown by
[Cr(NH3)5NO2] Cl2 is
|
|
|
a )
optical
|
|
b )
ionisation
|
|
c )
geometrical
|
|
d )
linkage
|
| 127)
One of the following equilibra is not affected by change
in volume of the flask
|
|
a )
PCl5(g)  PCl5(g) + cl2(g)
|
|
b )
N2(g) + 3H2(g) 2NH3(g)
|
|
c )
N2(g) + O2(g) 2NO(g)
|
|
d )
SO2Cl2(g) SO2(g) + Cl2(g)
|
| 128)
Uncertainty in position of a particle of 25 g in space is
10-5 m. Hence uncertainty in velocity (ms-1) is (Planck's
constant h = 6.6 X 10-34 Js)
|
|
|
a )
2.1 X 10-28
|
|
b )
2.1 X 10-34
|
|
c )
0.5 X 10-34
|
|
d )
5.0 X 10-24
|
129)
Consider the following reactions at 1100°C
I. 2C + O2 → 2CO , Δ G° = - 460 kJ mol-1
II. 2Zn + O2 → 2ZnO , Δ G° = - 360 kJ mol-1
Based on these, select correct alternative:
|
|
|
a )
zinc can be oxidised by CO
|
|
b )
zinc oxide can be reduced by carbon
|
|
c )
both are correct
|
|
d )
none is correct
|
| 130)
A reaction is non-spontaneous at the freezing point of
water but is spontaneous at the boiling point of water
then
|
|
|
a )
|
|
b )
|
|
c )
|
|
d )
|
| 131)
Monomers are converted to polymer by
|
|
|
a )
hydrolysis of monomers
|
|
b )
condensation reaction between monomers
|
|
c )
protonation of monomers
|
|
d )
none is correct.
|
| 132)
Increasing order of bond strength of O2, O2- , O22- and
O2+ is
|
|
|
a )
O2+ < O2 < O2- < O22-
|
|
b )
O2 < O2+ < O2- < O22-
|
|
c )
O2- < O22- < O2+ < O2
|
|
d )
O22- < O2- < O2 < O2+
|
| 133)
Most common oxidation states of Ce (Cerium) are
|
|
|
a )
+3 , +4
|
|
b )
+2 , +3
|
|
c )
+2 , +4
|
|
d )
+3 , +5
|
| 134)
Ce3+, La3+, Pm3+ and Yb3+
have ionic radii in the increasing order as
|
|
|
a )
La3+ < Ce3+ < Pm3+ < Yb3+
|
|
b )
Yb3+ < Pm3+ < Ce3+ < La3+
|
|
c )
La3+ = Ce3+ < Pm3+ < Yb3+
|
|
d )
Yb3+ < Pm3+ < La3+ < Ce3+
|
| 135)
pH of 0.005 M calcium acetate (PKa of CH3COOH =
4.74) is
|
|
|
a )
7.04
|
|
b )
9.37
|
|
c )
9.26
|
|
d )
8.37
|
| 136)
H2 gas is absorbed on the metal surface like tungsten.
This follows ................ order reaction
|
|
|
a )
third
|
|
b )
second
|
|
c )
zero
|
|
d )
first
|
| 137)
Rate constant k of the first order reaction is initial concentration C0 and
concentration Ct, at time t by equation
kt = log C0 - log Ct
Graph is a straight line if we plot
|
|
|
a )
t vs log C0
|
|
b )
t vs log Ct
|
|
c )
t-1 vs log Ct
|
|
d )
log C0 vs log Ct
|
| 138)
Alum is widely used to purify water since
|
|
|
a )
it forms complex with clay particles
|
|
b )
it coagulates the mud particles
|
|
c )
it exchanges Ca2+ and Mg2+ ions present in hard water
|
|
d )
its sulphate ion is water purifier
|
| 139)
On vigorous oxidation by permangnate solution
(CH3)2 C = CHCH2CHO gives
|
|
|
a )
(CH3)2CO and OHCCH2CHO
|
b )
|
|
c )
(CH3)2CO and OHCCH2COOH
|
|
d )
(CH3)2CO and CH2(COOH)2
|
140)
In the following benzyllallyl system
(R is alkyl group)
increasing order of inductive effect is
|
|
|
a )
(CH3)3C → (CH3)2CH → CH3CH2 �
|
|
b )
CH3CH2 → (CH3)2CH - > (CH3)3C �
|
|
c )
(CH3)2CH → CH3CH2 → (CH3)3C �
|
|
d )
(CH3)2C → CH3CH2 → (CH3)3CH �
|
| 141)
PCl3 and PCl5 both exist; NCl3 exists but NCl5 does
not exist. It is due to
|
|
|
a )
lower electronegativity of P than N
|
|
b )
lower tendency of N to form covalent bond
|
|
c )
availability of vacant d-obital in P but not in N
|
|
d )
statement is itself incorrect
|
142)
Following types of compounds (as I, II)
are studied in terms of isomerism in the category of
|
|
|
a )
chain isomerism
|
|
b )
position isomerism
|
|
c )
conformers
|
|
d )
stereoisomerism
|
| 143)
Conductivity (Seimen's S) is directly proportional to area of the vessel and the
concentration of the solution in it and is inversely proportional to the length of the vessel,
then constant of proportionality is expressed in
|
|
|
a )
S m mol-1
|
|
b )
S2 m2 mol-2
|
|
c )
S m2 mol-1
|
|
d )
S2 m2 mol
|
| 144)
A heat engine absorbs heat q1 from a source at temperature T1 and
heat q2 from a source at temperature T2. Work done is found to be
J (q1 + q2). This is in accordance with
|
|
|
a )
first law of thermodynamics
|
|
b )
second law of thermodynamics
|
|
c )
Joules equivalent law
|
|
d )
none of the above
|
| 145)
Select correct statement
|
|
|
a )
when a covalent bond is formed, transfer of electrons takes place
|
|
b )
pure H2O does not contain any ion
|
|
c )
a bond is formed when attractive forces overcome repulsive forces
|
|
d )
HF is less polar than HBr
|
| 146)
The metallic sodium dissolves in liquid ammonia to form a deep blue coloured solution.
The deep blue colour is due to formation of
|
|
|
a )
solvated electron, e (NH3)x-
|
|
b )
solvated atomic sodium, Na(NH3)y
|
|
c )
( Na+ + Na- )
|
|
d )
NaNH2 + H2
|
| 147)
Maximum dehydration takes place that of
|
|
a )
|
b )
|
c )
|
d )
|
| 148)
SN1 reaction is more probable in
|
|
a )
|
b )
|
c )
|
d )
|
| 149)
Oxidation number of Cl in CaOCl2 (bleaching powder) is
|
|
|
a )
zero, since it contains Cl2
|
|
b )
- 1, since it contains Cl-
|
|
c )
+ 1, since it contains ClO-
|
|
d )
+ 1 and - 1 since it contains ClO- and Cl-
|
| 150)
Picric acid is
|
|
a )
|
b )
|
c )
|
d )
|