|
51
|
A particle
acted upon by three forces 3N, 4N and 5N is in static equilibrium. What is
the angle between the forces 3N and 4N?
|
[ 4
]
|
|
|
(1)
|
300
|
(2)
|
450
|
|
|
|
(3)
|
600
|
(4)
|
900
|
|
|
|
|
52
|
The value of
the divergence of the position vector in three dimensions is
|
[ 1
]
|
|
|
(1)
|
3
|
(2)
|
Zero
|
|
|
|
(3)
|
1
|
(4)
|
2
|
|
|
|
|
53
|
Four particles
of mass m each were placed at positions (0,0), (0,1), (1,1) and (1,0).
What is the centre of mass of the system of these particles?
|
[ 2 ]
|
|
|
(1)
|
|
(2)
|
|
|
|
|
(3)
|
|
(4)
|
|
|
|
|
|
54
|
The magnitude
of a force varies with time as . The impulse of the force for the time
between t = 1s to t = 5s is,
|
[ 3
]
|
|
|
(1)
|
40 Ns
|
(2)
|
20 Ns
|
|
|
|
(3)
|
148 Ns
|
(4)
|
268 Ns
|
|
|
|
|
55
|
Two small
spheres A and B of mass M and 2M, respectively, hang from the ceiling on
strings of equal length. Sphere A is drawn aside so that it is raised to a
height h0 as shown in the figure and then released.
Sphere A collides with sphere B; they stick together and swing to a
maximum height h equal to,
|
|
[ 1
]
|
|
|
(1)
|
|
(2)
|
|
|
|
|
(3)
|
|
(4)
|
|
|
|
|
|
56
|
A 3 kg body
which is initially at rest is moved to a distance of 6m by a constant
horizontal force of magnitude 9N. The final velocity of the body is,
|
[ 2
]
|
|
|
(1)
|
18 m/s
|
(2)
|
6 m/s
|
|
|
|
(3)
|
27 m/s
|
(4)
|
15 m/s
|
|
|
|
|
57
|
A racing car
travels on a circular track of radius 250 m. If the car moves with a
constant speed of 45 m/s, what is the angular speed of the car?
|
[ 3
]
|
|
|
(1)
|
0.108 rad/s
|
(2)
|
0.208 rad/s
|
|
|
|
(3)
|
0.180 rad/s
|
(4)
|
0.09 rad/s
|
|
|
|
|
58
|
In planetary
motion
|
[ 4
]
|
|
|
(1)
|
The linear speed remains
constant
|
(2)
|
Neither the angular
momentum nor angular speed remains constant.
|
|
|
|
(3)
|
The angular speed remains
constant
|
(4)
|
The total angular momentum
remains constant
|
|
|
|
|
59
|
On a planet
whose size is the same and mass 4 times as that of the earth, the amount
of energy needed to lift a 2 kg mass vertically, upwards through 2m
distance on the planet is (value of g on the surface of the earth = 10 m/s2)
|
[ 3
]
|
|
|
(1)
|
180 Joule
|
(2)
|
80 Joule
|
|
|
|
(3)
|
160 Joule
|
(4)
|
320 Joule
|
|
|
|
|
60
|
The mean
distance of the Mars from Sun is 1.524 times the distance of the earth
from Sun. Compute the period of revolution of Mars around the Sun.
|
[ 1
]
|
|
|
(1)
|
1.88 earth years
|
(2)
|
0.94 earth years
|
|
|
|
(3)
|
2.88 earth years
|
(4)
|
3.76 earth years
|
|
|
|
|
61
|
A large
cylindrical vessel filled with water is kept on the floor. Water is
allowed to flow out through a narrow opening situated at a height of 20 m
from the bottom of the vessel. The velocity of water is, (assume g = 10
m/s2)
|
[ 2
]
|
|
|
(1)
|
10 m/s
|
(2)
|
20 m/s
|
|
|
|
(3)
|
200 m/s
|
(4)
|
2 m/s
|
|
|
|
|
62
|
The stream
lines in a steady flow of a fluid
|
[ 4
]
|
|
|
(1)
|
can intersect with each
other
|
(2)
|
can only be straight lines
|
|
|
|
(3)
|
cannot bunch together
|
(4)
|
cannot intersect with each
other
|
|
|
|
|
63
|
How fast must
a metre stick be moving if its length is observed to shrink to 0.5 m?
|
[ 2
]
|
|
|
(1)
|
0.668 c (c is velocity of
light in vaccum. )
|
(2)
|
0.866 c
|
|
|
|
(3)
|
0.686 c
|
(4)
|
0.686 c
|
|
|
|
|
64
|
If the total
energy of a particle is exactly thrice its rest energy, then the velocity
of the particle is,
|
[ 1
]
|
|
|
(1)
|
 (c
is velocity of light in vaccum.)
|
(2)
|
|
|
|
|
(3)
|
|
(4)
|
|
|
|
|
|
65
|
The spring in
the spring balance stretches by xm when a mass of m kg is
suspended. If another mass M Kg is suspended from it, then the extension
of the spring will be,
|
[ 3
]
|
|
|
(1)
|
|
(2)
|
|
|
|
|
(3)
|
|
(4)
|
|
|
|
|
|
66
|
The equation
 where
A,T and are positive constants, represents a wave whose
|
[ 4
]
|
|
|
(1)
|
amplitude is
2A
|
(2)
|
Velocity is in the
negative x-direction
|
|
|
|
(3)
|
period is
|
(4)
|
speed is
|
|
|
|
|
67
|
A tuning fork
of unknown frequency gives six beats with another fork of 409 Hz
frequency. It gives two beats with a vibrator of frequency 413 Hz. The
frequency of the tuning fork is,
|
[ 4
]
|
|
|
(1)
|
407 |
(2)
|
403 |
|
|
|
(3)
|
411 |
(4) |
415 |
|
|
|
|
68
|
In
forced oscillation, when the frequency of the driving force is close to
resonance, |
[ 3
]
|
|
|
(1)
|
the
amplitude of oscillation alone increases |
(2)
|
the
energy of oscillation decreases |
|
|
|
(3)
|
the
energy and amplitude of oscillation increase |
(4) |
the
amplitude of oscillation decreases but the energy increases |
|
|
|
|
69 |
Helmholtz
free energy is a function of |
[ 2
]
|
|
|
(1)
|
( P,T ) |
(2)
|
( V,T ) |
|
|
|
(3)
|
( P,S ) |
(4) |
( V,S ) |
|
|
|
|
70 |
During
a first-order phase transition the free energy of the system |
[ 1
]
|
|
|
(1)
|
remains
constant |
(2)
|
increases |
|
|
|
(3)
|
decreases |
(4) |
diverges |
|
|
|
|
71 |
For
a system in which the number of particles is fixed, the reciprocal of the
Kelvin temperature T is given by (Let P = pressure, V = volume, S =
entropy and U = internal energy) |
[ 4
]
|
|
|
(1)
|
|
(2)
|
|
|
|
|
(3)
|
|
(4) |
|
|
|
|
|
72 |
According
to Wien's law the wave length at which a black body emits maximum energy
is, |
[ 2
]
|
|
|
(1)
|
proportional
to temperature |
(2)
|
inversely
proportional to temperature |
|
|
|
(3)
|
independent
of temperature |
(4) |
is
an unknown function of temperature |
|
|
|
|
73 |
One
mole of an ideal gas at a temperature T undergoes an isothermal process in
which the volume is doubled. The work done in this process is, |
[ 1
]
|
|
|
(1)
|
RT
ln(2) |
(2)
|
-RT
ln (2) |
|
|
|
(3)
|
RT
ln (3/2) |
(4) |
-RT
ln (3/2) |
|
|
|
|
74 |
The
efficiency of a Carnot engine increases with |
[ 3
]
|
|
|
(1)
|
increase
in the temperature of the sink |
(2)
|
increase
in the heat given out by the engine |
|
|
|
(3)
|
increase
in the temperature of the source |
(4) |
decrease
in the temperature of the source |
|
|
|
|
75 |
The
work done by an ideal gas in expanding from a volume of 2 m3
to a volume
of 22 m3 at a constant pressure of
10N/m2 is, |
[ 2
]
|
|
|
(1)
|
100
Joules |
(2)
|
200
Joules |
|
|
|
(3)
|
440
Joules |
(4) |
220
Joules |
|
|
|
|
76 |
In
a Young's double slit experiment using light of wave length 6.0  10_7
m,
the slits were 0.4 mm apart and the distance of the slits to the screen
was 1.20 m. Therefore, the separation of the fringes is, |
[ 1
]
|
|
|
(1)
|
1.8
mm |
(2)
|
1.8
cm |
|
|
|
(3)
|
1.8
nm |
(4) |
1.8
m |
|
|
|
|
77 |
In
the Newton's rings formed by reflected light, the diameters of the bright
rings are proportional to, |
[ 3
]
|
|
|
(1)
|
odd
natural numbers |
(2)
|
squares
of odd natural numbers |
|
|
|
(3)
|
square
roots of odd natural numbers |
(4) |
square
roots of natural numbers |
|
|
|
|
78 |
Two
coherent monochromatic light beams of intensities I and 4I are superposed.
The maximum and minimum intensities in the resulting beam are, |
[ 4
]
|
|
|
(1)
|
5I,
4I |
(2)
|
5I,
3I |
|
|
|
(3)
|
9I,
3I |
(4) |
9I,
I |
|
|
|
|
79 |
The
focal length of a zone plate is given by the relation |
[ 4
]
|
|
|
(1)
|
|
(2)
|
|
|
|
|
(3)
|
|
(4) |
|
|
|
|
|
80 |
The
system matrix of a lens is given by . Then
its focal length is, |
[ 2
]
|
|
|
(1)
|
_20
cm |
(2)
|
20
cm |
|
|
|
(3)
|
10
cm |
(4) |
_10
cm |
|
|
|
|
81 |
If
and  are the angles which the conjugate rays make with the axis,
 and are
the refractive indices of the object and images spaces and Y1 and Y2 are
the lengths of the object and of the image for the zone, the Abbe sine
condition is given by, |
[ 3
]
|
|
|
(1)
|
|
(2)
|
|
|
|
|
(3)
|
|
(4) |
|
|
|
|
|
82 |
A
light of wavelength 5000 Å is incident on a quarter wave plate made of
mica. The indices of refraction for the ordinary and extra-ordinary rays
in mica are 1.58 and 1.59. Then the thickness of mica is, |
[ 3
]
|
|
|
(1)
|
1.25
10_2 cm |
(2)
|
2.5
10_3 cm |
|
|
|
(3)
|
1.25
10_3 cm |
(4) |
1.25
mm |
|
|
|
|
83 |
The
potential at a point A in an electric field is 10V higher than at point B.
If a negative charge q = _2C is moved from point A to point B, then the
potential energy of this charge will, |
[ 4
]
|
|
|
(1)
|
decrease
by 20J |
(2)
|
decrease
by 5J |
|
|
|
(3)
|
increase
by 5J |
(4) |
increase
by 20J |
|
|
|
|
84 |
The
torque on a molecule which has a dipole moment  , when kept in an external
field is |
[ 3
]
|
|
|
(1)
|
|
(2)
|
|
|
|
|
(3)
|
|
(4) |
|
|
|
|
|
85 |
A
wire of resistance 72  is cut into two halves. If a potential difference of
120V is applied across one-half of the wire, the resistance dissipation
is, |
[ 2
]
|
|
|
(1)
|
200
W |
(2)
|
400
W |
|
|
|
(3)
|
800
W |
(4) |
600
W |
|
|
|
|
86 |
In
a coil an emf of 1 volt is induced when the current in the coil changes at
the rate of 100 A/s. The coefficient of self-induction of the coil is, |
[ 1
]
|
|
|
(1)
|
0.01
Henry |
(2)
|
10
Henry |
|
|
|
(3)
|
0.0001
Henry |
(4) |
0.001
Henry |
|
|
|
|
87 |
An
example for diamagnetic substance is, |
[ 3
]
|
|
|
(1)
|
Mn |
(2)
|
Fe3O4 |
|
|
|
(3)
|
NaCl |
(4) |
CuCl2 |
|
|
|
|
88 |
The
ratings of the primary of step-up transformer are 240 V and 5 A. If the
voltage at the secondary is 4800V, then the current through the secondary
is, |
[ 2
]
|
|
|
(1)
|
20A |
(2)
|
0.25A |
|
|
|
(3)
|
0.5A |
(4) |
1A. |
|
|
|
|
89 |
When
a current of 1A passes through a coil of radius 4cm having 50 turns,
magnetic induction at its centre is 210_5 T. When the radius is increased
to 8 cm and the number of turns to 200, the magnetic induction at the
centre of the coil will be, |
[ 1
]
|
|
|
(1)
|
4
10_5 T |
(2)
|
1
10_5 T |
|
|
|
(3)
|
2
10_5 T |
(4) |
8
10_5 T |
|
|
|
|
90 |
The
following substance exhibits the property of hysterisis, |
[ 4
]
|
|
|
(1)
|
H2O |
(2)
|
NaCl |
|
|
|
(3)
|
CuCl2 |
(4) |
Fe3O4 |
|
|
|
|
91 |
Assuming
the value of compton wavelength to be 0.0025 nm, the percentage change in
the wavelength dueto compton effect for radiation with wavelength of 250
nm and a scattering angle of 600 is, |
[ 4
]
|
|
|
(1)
|
1
10_ 4 |
(2)
|
1
10_3 |
|
|
|
(3)
|
2.510_5 |
(4) |
5
10_ 4 |
|
|
|
|
92 |
After
two hours, one-sixteenth of the starting amount of a certain radioactive
isotope remained undecayed The half-life of the isotope is, |
[ 3
]
|
|
|
(1)
|
1
hour |
(2)
|
45
minutes |
|
|
|
(3)
|
30
minutes |
(4) |
15
minutes |
|
|
|
|
93 |
If
1 mg of garbage is converted into energy with 100% efficiency over a time
period of 5s, then the total amount of power released is, (speed of light
= 3108
ms_1) |
[ 1
]
|
|
|
(1)
|
1
.81010 W |
(2)
|
9
1010 W |
|
|
|
(3)
|
6
1010 W |
(4) |
1.21010 W |
|
|
|
|
94 |
The
energy released in the fission of 1g of U235 assuming the amount of
energy released per fission to be 235 Mev is, (Avogadros number = 61023
mole_ 1) |
[ 2
]
|
|
|
(1)
|
1.6
1010 J |
(2)
|
9.6
1010J |
|
|
|
(3)
|
6.0
1010 J |
(4) |
2.35
1010 J |
|
|
|
|
95 |
In
the given proton-proton cycle, the given out radiation is,  MeV
+ radiation, |
[ 3
]
|
|
|
(1)
|
 _
rays
|
(2)
|
 _
rays
|
|
|
|
(3)
|
 _
rays
|
(4) |
cosmic
rays, |
|
|
|
|
96 |
When
high energy electrons strike a copper metal target, the emitted radiation
is, |
[ 4
]
|
|
|
(1)
|
 _
rays
|
(2)
|
 _
rays
|
|
|
|
(3)
|
 _
rays
|
(4) |
X
_ rays |
|
|
|
|
97 |
If
and 
are the current gains in the CB and CE configurations, respectively,
of a transistor circuit, then |
[ 2
]
|
|
|
(1)
|
2 |
(2)
|
1 |
|
|
|
(3)
|
|
(4) |
|
|
|
|
|
98 |
The
overall voltage gain when three identical amplifier stages are connected
is 125, then the voltage gain of an individual stage is, |
[ 3
]
|
|
|
(1)
|
|
(2)
|
25 |
|
|
|
(3)
|
5 |
(4) |
|
|
|
|
|
99 |
The
Boolean equation of NAND gate is, |
[ 1
]
|
|
|
(1)
|
X
= |
(2)
|
X
= |
|
|
|
(3)
|
X
= |
(4) |
X
= A + B |
|
|
|
|
100 |
The
binary equivalent of (0.6875)10 is |
[ 4
]
|
|
|
(1)
|
0.1001 |
(2)
|
0.1101 |
|
|
|
(3)
|
0.0110 |
(4) |
0.1011 |
|
|
|
|
Chemistry
(Marks
: 50) |
|
|
|
101 |
What
is the wavelength of least energetic spectral line in the Lyman series of
hydrogen spectrum? (R = Rydberg constant). |
[ 2
]
|
|
|
(1)
|
|
(2)
|
|
|
|
|
(3)
|
|
(4) |
|
|
|
|
|
102 |
An
element has 16 electrons in its M-shell. The element is ______________. |
[ 4
]
|
|
|
(1)
|
Fe |
(2)
|
Mn |
|
|
|
(3)
|
Cu |
(4) |
Ni |
|
|
|
|
103 |
Which
of the following is true? |
[ 2
]
|
|
|
(1)
|
The
number of electrons present in "L" shell of nitrogen atom is 6. |
(2)
|
The
energy of 3d orbital is higher than the energy of 3p orbital. |
|
|
|
(3)
|
The
four quantum numbers of valence electron of sodium are: n = 3; l =
1; m = 0 ; s =  . |
(4) |
2s
orbital has two spherical nodal planes. |
|
|
|
|
104 |
75
ml of 0.2 M HCl and 25 ml of 0.2M NaOH are mixed. What is the pH of
resultant solution? |
[ 3
]
|
|
|
(1)
|
0.7 |
(2)
|
1.4 |
|
|
|
(3)
|
1.0 |
(4) |
2.0 |
|
|
|
|
105 |
The
total number of sigma bonds present in ethyne molecule is ______________. |
[ 1
]
|
|
|
(1)
|
3 |
(2)
|
4 |
|
|
|
(3)
|
1 |
(4) |
2 |
|
|
|
|
106 |
The
volume occupied by an individual molecule of a gas is 210_23
cm3.
The Van der Waal's constantb' (in cm3.
mol_1) of this gas is
______________. |
[ 3
]
|
|
|
(1)
|
2
10_23 |
(2)
|
12.04 |
|
|
|
(3)
|
48.184 |
(4) |
12.04
10_23 |
|
|
|
|
107 |
Which
of the following is a strong base? |
[ 1
]
|
|
|
(1)
|
(CH3)2NH |
(2)
|
CH3NH2 |
|
|
|
(3)
|
NH3 |
(4) |
(CH3)3N |
|
|
|
|
108 |
The
equation of law of corresponding states is given by ______________. ( =
reduced pressure; = reduced volume;
= reduced temperature) |
[ 1
]
|
|
|
(1)
|
|
(2)
|
|
|
|
|
(3)
|
|
(4) |
|
|
|
|
|
109 |
For
mono atomic gases, the ratio of heat capacities 
is equal to ______________. |
[ 4
]
|
|
|
(1)
|
0.6 |
(2)
|
1.33 |
|
|
|
(3)
|
2.66 |
(4) |
1.67 |
|
|
|
|
110 |
The
hybridisation of carbon in methyl carbonium ion is ______________. |
[ 2
]
|
|
|
(1)
|
sp |
(2)
|
sp2 |
|
|
|
(3)
|
sp3 |
(4) |
dsp2 |
|
|
|
|
111 |
The
molar enthalpies of combustion of C2H2 (g), C (graphite) and
H2 (g) are
_1299.6, _393.5 and
_285.8 KJ mol_1, respectively. The standard
enthalpy of formation (in KJ mol-1) of C2H2 (g) is _____________. |
[ 3
]
|
|
|
(1)
|
620.3 |
(2)
|
1240.6 |
|
|
|
(3)
|
226.8 |
(4) |
453.6 |
|
|
|
|
112 |
Which
of the following contains S-O-S bonds in its structure? |
[ 4
]
|
|
|
(1)
|
H2S2O3 |
(2)
|
H2S2O8 |
|
|
|
(3)
|
H2S2O6 |
(4) |
H2S2O7 |
|
|
|
|
113 |
With
respect to the reaction , 
the amount (in grams) of K2Cr2O7 (mol. wt = 294.18) required to prepare a
100 ml of its solution of 0.05 N concentration is |
[ 3
]
|
|
|
(1)
|
2.9418 |
(2)
|
1.4709 |
|
|
|
(3)
|
0.2452 |
(4) |
0.4903 |
|
|
|
|
114 |
Which
of the following is not true? |
[ 4
]
|
|
|
(1)
|
SO3
is a Lewis acid |
(2)
|
SO3
reacts with PCl5 to form
POCl3,
Cl2 and
SO2 |
|
|
|
(3)
|
SO3
dissolves in concentrated H2SO4 to form
oleum. |
(4) |
SO3
reacts with HBr to form HBrO3 |
|
|
|
|
115 |
The
IUPAC name of (CH3)3 C
_ CH =
CH2 is ______________. |
[ 1
]
|
|
|
(1)
|
3,3
dimethyl _ 1 _ butene |
(2)
|
3,3,3
trimethyl _1_ propene |
|
|
|
(3)
|
1,1,1trimethyl
_3_ propene |
(4) |
2,2
dimethyl _3 _ butene |
|
|
|
|
116 |
The
hybridisation of S in SCl2 is ______________. |
[ 2
]
|
|
|
(1)
|
sp |
(2)
|
sp3 |
|
|
|
(3)
|
sp2 |
(4) |
sp3d |
|
|
|
|
117 |
The
solubility of a sparingly soluble salt AX2 is 10_6 mol. lit_1 at
27oC. What is its Ksp (in mol3.lit_3)? |
[ 3
]
|
|
|
(1)
|
10_12 |
(2)
|
4
10_12 |
|
|
|
(3)
|
4
10_18 |
(4) |
10_18 |
|
|
|
|
118 |
Newmann
projection formula for 1,2 dichloro ethane is represented as
______________. |
[ 3
]
|
|
|
(1)
|
|
(2)
|
|
|
|
|
(3)
|
|
(4) |
|
|
|
|
|
119 |
Ionization
energy is highest for an element with electronic configuration
______________. |
[ 3
]
|
|
|
(1)
|
[Ne]
3s2
3p1 |
(2)
|
[Ne]
3s1 |
|
|
|
(3)
|
[Ne]
3s2
3p3 |
(4) |
[Ne]
3s2
3p2 |
|
|
|
|
120 |
922
g of NaOH solution contains 40 g of NaOH. What is the mole fraction of
NaOH in this solution? (Mol. wt. of NaOH = 40; Mol .wt. of H2O = 18) |
[ 4
]
|
|
|
(1)
|
0.05 |
(2)
|
0.2 |
|
|
|
(3)
|
0.5 |
(4) |
0.02 |
|
|
|
|
121 |
The
functional isomer of glyceraldehyde is ______________. |
[ none
]
|
|
|
(1)
|
methyl
acetate |
(2)
|
ethyl
acetate |
|
|
|
(3)
|
diethyl
ether |
(4) |
propyl
acetate |
|
|
|
|
122 |
Some
quantity of PCl5 was heated in a 10 litre vessel at 250OC to obtain the
equilibrium 
At equilibrium the vessel contains 0.1 mole of PCl5, 0.2 mole of PCl3 and
0.2 mole of Cl2. The equilibrium constant (in mol. lit_1) of the
reaction is ______________. |
[ 3
]
|
|
|
(1)
|
0.02 |
(2)
|
0.4 |
|
|
|
(3)
|
0.04 |
(4) |
0.025 |
|
|
|
|
123 |
Hydrolysis
of CH3CH2MgX gives ______________. |
[ 1
]
|
|
|
(1)
|
C2H6 |
(2)
|
C3H8 |
|
|
|
(3)
|
CH4 |
(4) |
C2H4 |
|
|
|
|
124 |
In
a chemical reaction, the rate of forward and rate of backward reactions
are given by Rf and
Rb, respectively. At equilibrium ______________. |
[ 2
]
|
|
|
(1)
|
Rf
= 2Rb |
(2)
|
Rf=
Rb |
|
|
|
(3)
|
Rf
= 0.5 Rb |
(4) |
Rf= |
|
|
|
|
125 |
Which
of the following is an example for metallic carbide? |
[ 1
]
|
|
|
(1)
|
tantalum
carbide |
(2)
|
silicon
carbide |
|
|
|
(3)
|
calcium
carbide |
(4) |
aluminium
carbide |
|
|
|
|
126 |
The
equilibrium constant for the reaction N2(g) +
3H2(g)
----2NH3(g) is K.
Then the equilibrium constant for the reaction NH3 (g) --- 
N2(g) +  H2(g)
will be equal to ______________. |
[ 4
]
|
|
|
(1)
|
|
(2)
|
|
|
|
|
(3)
|
|
(4) |
|
|
|
|
|
127 |
Quartz
is a crystalline form of ______________. |
[ 2
]
|
|
|
(1)
|
silicon |
(2)
|
silicon
dioxide |
|
|
|
(3)
|
silicon
carbide |
(4) |
sodium
silicate |
|
|
|
|
128 |
An
alkene 'X on ozonolysis gave propanone and 2-methyl propanal. The
structure of X is _________. |
[ 2
]
|
|
|
(1)
|
CH3CH
= C(CH3)
CH2CH3 |
(2)
|
(CH3)2C
= CHCH(CH3)2 |
|
|
|
(3)
|
(CH3)2
CHCH = CHCH3 |
(4) |
(CH3)2C
= C(CH3)2 |
|
|
|
|
129 |
In
the structure of Fe3
(CO)12 molecule, the number of CO molecules present
between two nearest Featoms is ______________. |
[ 3
]
|
|
|
(1)
|
3 |
(2)
|
4 |
|
|
|
(3)
|
2 |
(4) |
1 |
|
|
|
|
130 |
|
is
an example of ______________. |
[ 3
]
|
|
|
(1)
|
trans
isomer |
(2)
|
cis
isomer |
|
|
|
(3)
|
E-isomer |
(4) |
Z-isomer |
|
|
|
|
131 |
The
reagent used for selectively converting an alkyne into a trans alkene is
______________. |
[ 4
]
|
|
|
(1)
|
Lindlar
catalyst |
(2)
|
Sodium
dithionate |
|
|
|
(3)
|
NaBH4 |
(4) |
Na
/ Liquid NH3 |
|
|
|
|
132 |
An
alkene on treating with hot acidified KMnO4 gave two molecules of ethanoic
acid. The alkene is______________. |
[ 4
]
|
|
|
(1)
|
1-butene |
(2)
|
2-methyl
propene |
|
|
|
(3)
|
2-pentene |
(4) |
2-butene |
|
|
|
|
133 |
What
is the oxidation state of P in H3PO5? |
[ 3
]
|
|
|
(1)
|
+7 |
(2)
|
+6 |
|
|
|
(3)
|
+5 |
(4) |
+4 |
|
|
|
|
134 |
The
molecular formula of aluminium azide is ______________. |
[ 2
]
|
|
|
(1)
|
Al
N3 H6 |
(2)
|
Al
N9 |
|
|
|
(3)
|
Al
N3 |
(4) |
Al
N |
|
|
|
|
135 |
Which
of the following is used in welding and cutting of metals? |
[ 4
]
|
|
|
(1)
|
CH4 |
(2)
|
C2H6 |
|
|
|
(3)
|
C2H4 |
(4) |
C2H2 |
|
|
|
|
136 |
Ammonia
is reacted with excess chlorine to form HCl and X. Hydrolysis of X
gave ammonia and______________. |
[ 1
]
|
|
|
(1)
|
HOCl |
(2)
|
Cl2O |
|
|
|
(3)
|
HClO3 |
(4) |
Cl2O7 |
|
|
|
|
137 |
The
hybridisation of Cl in perchloric acid is ______________. |
[ 4
]
|
|
|
(1)
|
dsp2 |
(2)
|
sp |
|
|
|
(3)
|
sp2 |
(4) |
sp3 |
|
|
|
|
138 |
P2O5
is heated with carbon. The products obtained are elemental phosphorus and X.
Which of the following is X? |
[ 2
]
|
|
|
(1)
|
CO2 |
(2)
|
CO |
|
|
|
(3)
|
P2(CO3)5 |
(4) |
P2(CO3)3 |
|
|
|
|
139 |
The
species involved in the nitration of benzene is ______________. |
[ 2
]
|
|
|
(1)
|
carbonium
ion |
(2)
|
nitronium
ion |
|
|
|
(3)
|
carbanion |
(4) |
nitrate
ion |
|
|
|
|
140 |
Coordinate
covalent bond is not present in ______________. |
[ 1 and 4 ]
|
|
|
(1)
|
NH4+ |
(2)
|
K3
[Fe(CN)6] |
|
|
|
(3)
|
H3N
BF3 |
(4) |
NH3 |
|
|
|
|
141 |
Hexagonal
close packed arrangement of atoms is characterised by ______________. |
[ 1
]
|
|
|
(1)
|
ABABAB...... |
(2)
|
ABCABCABC.....
|
|
|
|
(3)
|
ABABCAB..... |
(4) |
ABCABABC |
|
|
|
|
142 |
Which
of the following is an example of Friedel- Crafts reaction? |
[ 3
]
|
|
|
(1)
|
|
|
|
|
(2) |
|
|
|
|
(3) |
|
|
|
|
(4)
|
|
|
|
|
|
143 |
AgZn
with a "number of valence electrons / number of atoms" ratio
equal to belongs to
_______ phase.
|
[ 3
] |
|
|
(1)
|
|
(2)
|
|
|
|
|
(3)
|
|
(4) |
|
|
|
|
|
144 |
Reduction
of napthalene in the presence of  at
high temperature and pressure gives _____________.
|
[ 1
] |
|
|
(1)
|
decalin |
(2)
|
pthalic
acid |
|
|
|
(3)
|
napthaquinone |
(4) |
tetra
hydro napthalene |
|
|
|
|
145 |
Which
of the following enzyme converts C6H12O6 to ethanol? |
[ 4
]
|
|
|
(1)
|
invertase |
(2)
|
diastase |
|
|
|
(3)
|
maltase |
(4) |
zymase |
|
|
|
|
146 |
Which
of the following alloy of iron is useful for making permanent magnets? |
[ 2
]
|
|
|
(1)
|
chromium
steel |
(2)
|
alnico |
|
|
|
(3)
|
duriron |
(4) |
manganese
steel |
|
|
|
|
147 |
Soap
is made by ______________. |
[ 4
]
|
|
|
(1)
|
esterification
of glycol |
(2)
|
hydrogenation
of fats |
|
|
|
(3)
|
hydrogenation
of oils |
(4) |
alkaline
hydrolysis of triglycerides |
|
|
|
|
148 |
The
Hume-Rothery ratio for the intermetallic compound Cu9Al4 is
______________. |
[ 1
]
|
|
|
(1)
|
21:13 |
(2)
|
3:2 |
|
|
|
(3)
|
7:4 |
(4) |
4:7 |
|
|
|
|
149 |
Which
of the following on hydrolysis gives straight chain silicone polymers? |
[ 2
]
|
|
|
(1)
|
(CH3)3
SiCl |
(2)
|
(CH3)2SiCl2 |
|
|
|
(3)
|
(CH3)
SiCl3 |
(4) |
SiCl4 |
|
|
|
|
150 |
Which
of the following is not true? |
[ 3
]
|
|
|
(1)
|
Cadmium
amalgam is used in Weston standard cell.
|
|
|
|
(2) |
Cadmium
sulphide is used as yellow pigment in the preparation of oil-water colours. |
|
|
|
(3) |
German
silver is an alloy of cadmium. |
|
|
|
(4)
|
Wood's
alloy contains bismuth, lead, tin and cadmium. |
|
|
|
