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VITEEE PCME Mock Test - 7

125 Questions MCQ Test VITEEE: Subject Wise and Full Length MOCK Tests | VITEEE PCME Mock Test - 7

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This mock test of VITEEE PCME Mock Test - 7 for JEE helps you for every JEE entrance exam. This contains 125 Multiple Choice Questions for JEE VITEEE PCME Mock Test - 7 (mcq) to study with solutions a complete question bank. The solved questions answers in this VITEEE PCME Mock Test - 7 quiz give you a good mix of easy questions and tough questions. JEE students definitely take this VITEEE PCME Mock Test - 7 exercise for a better result in the exam. You can find other VITEEE PCME Mock Test - 7 extra questions, long questions & short questions for JEE on EduRev as well by searching above.

QUESTION: 1

The sides of an equilateral triangle are increasing at the rate of 2 cm/sec. The rate at which the area increases, when the side is 10 cm is

A.
√3 sq. units/sec
B.
10 sq. units/sec
C.
10√3 sq. units/sec
D.
10/√3 sq. units/sec

Solution:

QUESTION: 2

The area bounded by the parabola x = 4 − y² and the y-axis, in square units is

A.
3/32
B.
32/3
C.
33/2
D.
16/3

Solution:

QUESTION: 3

A.
3abc + a³ + b³ + c³
B.
3abc - a³ - b³ - c³
C.
abc - a³ + b³ + c³
D.
abc + a³ - b³ - c³

Solution:

QUESTION: 4

The argument and modulus of [(1+i)/(1-i)] are respectively

A.
(-π/2) and 1
B.
(π/2) and √2
C.
0 and √2
D.
(π/2) and 1

Solution:

QUESTION: 5

If a is real number such that | z − a i | = | z + a i | , then the locus of z is

A.
x − axis
B.
y − axis
C.
x = y
D.
x² + y² = 1

Solution:

QUESTION: 6

for x ≠ 0, f 0 = 0, then f(x) at x = 0 is

A.
Continuous
B.
Discontinuous
C.
Not determined
D.
None

Solution:

QUESTION: 7

If - 9 is the root of the equation , then other two roots are

A.
2, 7
B.
- 2, 7
C.
- 2, - 7
D.
2, - 7

Solution:

QUESTION: 8

A.
0
B.
1
C.
2
D.
-1

Solution:

QUESTION: 9

Let f(x) = log |x - 1|, x ≠ 1. The value of f ′(1/2) is

A.
-2
B.
2
C.
does not exist
D.
none of these

Solution:

QUESTION: 10

The order and degree of the differential equation (1 + 3dy/dx)^2/3 = 4d³y/dx³ are

A.
1, 2/3
B.
3, 1
C.
3, 3
D.
1, 2

Solution:

QUESTION: 11

The differential equation representing the family of curves y²= 2c(x+√c), where c is a positive perimeter, is of

A.
order 1, degree 3
B.
order 1, degree 2
C.
degree 3 order 3
D.
degree 4 order 4

Solution:

QUESTION: 12

The general solution of the differential equation is given by

A.
tan y + cot x = c
B.
tan y - cot x = c
C.
tan x - cot y = c
D.
tan x + cot x = c

Solution:

QUESTION: 13

The differential equation of all circles which pass through (0,0) and having centre on y-axis, is

A.
(x²-y²)(dy/dx)-2xy=0
B.
(x²-y²))(dy/dx)+2xy=0
C.
(x²-y²)(dy/dx)-xy=0
D.
(x²-y²))(dy/dx)+xy=0

Solution:

QUESTION: 14

A.
1
B.
2
C.
3
D.
4

Solution:

QUESTION: 15

then f'(1) is ?

A.
-1/9
B.
-2/9
C.
-1/3
D.
1/3

Solution:

QUESTION: 16

∫tan^-1x dx =

A.
xtan^-1x + (1/2) log (1+x²)
B.
x ttan^-1x - (1/2) log (1+x²)
C.
(x-1) tan^-1x
D.
xtan^-1x - log(1+x²)

Solution:

QUESTION: 17

∫ tan⁵θ dθ =

A.
B.
C.
D.
None

Solution:

QUESTION: 18

The domain of sin^-1x is

A.
[ 0 , π ]
B.
[ − 1 , 1 ]
C.
(− ∞ , ∞)
D.
− 1 , 1

Solution:

QUESTION: 19

If f'(2) = 4 and f ' (1) = 2 then

A.
3
B.
4
C.
-4
D.
Does not exist

Solution:

QUESTION: 20

The value of

A.
e^log₃7
B.
e^log₇3
C.
e^log7
D.
e^log3

Solution:

QUESTION: 21

If A and B are 2 x 2 matrices then (A+B)²=

A.
A²+2AB+B²
B.
A²+AB + BA +B²
C.
A²+2BA+B²
D.
none of these

Solution:

QUESTION: 22

If A is singular matrix of order n, then a (adj A) equals,

A.
null matrix
B.
row matrix
C.
identity matrix
D.
none of these

Solution:

QUESTION: 23

Reena says "The number I am thinking is divisible by 2 or it is divisible by 3". This statement is false if the number Reena is thinking of is

A.
6
B.
8
C.
11
D.
15

Solution:

This sentence contains the word "or" (disjunction).
A disjunction is only false if BOTH conditions are false.
The only number that is not divisble by 2 and is not divisible by 3 is 11.

QUESTION: 24

Box A contains 2 black and 3 red balls, while box B contains 3 black and 4 red balls. Out of these two boxes one is selected at random, and the probability of choosing box A is double that of box B. If a red ball is drawn from the selected box then the probability that it has come from box B is

A.
21/41
B.
10/31
C.
12/31
D.
13/41

Solution:

QUESTION: 25

In an examination there are three objective questions and in each question there are 4 options. The number of ways in which any candidate may not give correct answers to all questions is

A.
11
B.
12
C.
27
D.
63

Solution:

QUESTION: 26

If A and B are two events such that P(A) = 1/4 , P(B) = 1/2 , P(A ∪ B) = 5/8 then P(A ∩ B) =

A.
3/8
B.
1/8
C.
2/8
D.
5/8

Solution:

QUESTION: 27

A card is taken out of a pack of 52 cards numbered 2 to 53. The probability that the number on the card is a prime number less than 20 is

A.
1/13
B.
2/13
C.
3/13
D.
4/13

Solution:

QUESTION: 28

In ∆ABC, if cotA,cotB,cotC are in A.P., then a²,b²,c² are in

A.
G.P.
B.
H.P.
C.
A.P.
D.
none of these

Solution:

QUESTION: 29

The most stable measure of central tendency is

A.
mean
B.
median
C.
mode
D.
none of these

Solution:

QUESTION: 30

The harmonic mean of 4,8,16 is

A.
6.4
B.
6.7
C.
6.85
D.
7.8

Solution:

QUESTION: 31

If the sum of first n terms of an A.P. is pn + qn² where p and q are constants, then common difference of A.P. will be

A.
p + q
B.
p - q
C.
2 p
D.
2 q

Solution:

For the A.P.
S_n = pn + qn²
Now S₁ = p x 1 + q(1)²
S₁ = p x q ⇒ T₁ = p + q
Also S₂ = p x 2 + q(2)²
= 2p + 4q
We have T₁ + T₂ = 2p + 4q
or T₂ = 2p + 4q - T₁
or T₂ = 2p + 4q - (p + q)
or T₂ = p + 3q
Hence common difference = T₂ - T₁
= p + 3q - (p + q)
= p + 3q - p - q = 2q

QUESTION: 32

The solution of the equation x+(1/x)=2 is

A.
2,-1
B.
0,-1,-(1/5)
C.
-1,-(1/5)
D.
none of these

Solution:

QUESTION: 33

If the roots of x²+x+a=0 are greater than a, then

A.
2<a<3
B.
a>3
C.
-3<a<3
D.
a<-2

Solution:

QUESTION: 34

The points (5,-4,2),(4,-3,1),(7,-6,4),(8,-7,5) are vertices of a

A.
square
B.
Parallelogram
C.
Rectangle
D.
Rhombus

Solution:

QUESTION: 35

If the planes x+2y+Kz=0 and 2x+y-2z=0 are at right angles, then the value of K is

A.
-1/2
B.
1/2
C.
-2
D.
2

Solution:

QUESTION: 36

If α is a root of 25cos²θ + 5cosθ - 12 = 0, (π/2)<α<π, then sin2α is equal to

A.
24/25
B.
-(24/25)
C.
13/18
D.
-(13/18)

Solution:

QUESTION: 37

If the pair of lines ax² + 2hxy + by² + 2gx + 2fy + c = 0 intersect on the y-axis then

A.
2fgh = bg² + ch²
B.
bg² ≠ ch²
C.
abc = 2fgh
D.
none of these

Solution:

QUESTION: 38

The equation of the parabola whose focus is (5, 3) and directrix is 3x - 4y + 1 = 0 is

A.
(4x + 3y)² - 256x - 142y + 849 = 0
B.
(4x - 3y)² - 256x - 142y + 459 = 0
C.
(3x + 4y)² - 142x - 256y + 849 = 0
D.
(3x - 4y)² - 256x - 142y + 849 = 0

Solution:

QUESTION: 39

If the position vectors of C and B with respect to B and A are i+j, i-j respectively, the position vector of C with respect to A is

A.
2i
B.
2j
C.
-2j
D.
-2i

Solution:

QUESTION: 40

A force of magnitude 5 units acting along the vector 2 î - 2 ĵ + k̂ displaces the point of application from (1, 2, 3) to (5, 3, 7), then the work done is

A.
50/7
B.
50/3
C.
25/3
D.
25/4

Solution:

QUESTION: 41

The power factor of LCR circuit at resonance is

A.
0.707
B.
0.5
C.
1
D.
Zero

Solution:

QUESTION: 42

The de-Broglie wavelength of a particle moving with a velocity 2 .25 x 10⁸ m s^-1 is equal to the wavelength of a photon. The ratio of kinetic energy of the particle to the energy of the photon is [ velocity of light = 3 x 10⁸ m s^-1 ]

A.
1/8
B.
3/8
C.
5/8
D.
7/8

Solution:

From Compton effect
λ = h/p = c/v [From de-Broglie wavelength]
c p = h v

QUESTION: 43

The penetrating power of X - rays increases with the

A.
Increase in its velocity
B.
Decreases in its velocity
C.
Decrease in its frequency
D.
Increase in its frequency

Solution:

QUESTION: 44

Three different capacitors are connected in series. Then:

A.
they will have equal charges
B.
they will have same potential
C.
both 1 and 2
D.
none of these

Solution:

QUESTION: 45

The internal resistance of a primary cell is 4 Ω. It generates a current of 0.2 A in an external resistance of 21 Ω. The rate at which chemical energy is consumed in providing the current is

A.
0.42 J s^-1
B.
0.84 J s^-1
C.
1 J s^-1
D.
5 J s^-1

Solution:

QUESTION: 46

A laser beam is used for carrying out surgery because it

A.
is highly monochromatic
B.
is highly coherent
C.
is highly directional
D.
can be sharply focussed

Solution: As the laser beam is highly monochromatic, directional and coherent, it can be sharply focussed.
Therefore it is used for carrying out surgery

QUESTION: 47

A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be

A.
64 W
B.
80 W
C.
100 W
D.
125 W

Solution:

QUESTION: 48

An ammeter with internal resistance 90Ω reads 1.85 A when connected in a circuit containing a battery and two resistors 700Ω and 410Ω in series. Actual current will be

A.
1.85 A
B.
Greater than 1.85 A
C.
Less than 1.85 A
D.
None of these

Solution:

QUESTION: 49

A wire of length L is drawn such that its diameter is reduced to half of its original diameter. If the initial resistance of the wire were 10Ω, its new resistance would be

A.
40Ω
B.
80Ω
C.
120Ω
D.
160Ω

Solution:

QUESTION: 50

Keeping the length of the conductor constant, if the radius of the conductor is doubled, then its resistance becomes

A.
Double
B.
Quadrupled
C.
Half
D.
Four times less

Solution:

QUESTION: 51

What will be the ratio of de Broglie wavelengths of proton and α-particle of same energy

A.
2:1
B.
1:2
C.
4:1
D.
1:1

Solution:

We know , m_α = 2 m_p

QUESTION: 52

The working of a dynamo is based on principle of

A.
Conversion of energy into electricity
B.
Magnetic effects of current
C.
Electromagnetic induction
D.
Heat effects of current

Solution:

QUESTION: 53

Which of the following does not obey the phenomenon of mutual induction?

A.
dynamo
B.
transformer
C.
induction coil
D.
electric heater

Solution:

QUESTION: 54

The number of turns in the primary coil of a transformer is 200 and the number of turns in secondary coil is 10. If 240 V a.c. is applied to the primary, the output from secondary will be

A.
48 V
B.
24 V
C.
12 V
D.
6 V

Solution:

QUESTION: 55

The ozone layer absorbs

A.
infrared radiations
B.
ultraviolet radiations
C.
X-rays
D.
γ-rays

Solution:

QUESTION: 56

A charge is placed at the centre of a cube, the flux emitted through its one face is

A.
q/∈₀
B.
q/2 ∈₀
C.
q/6 ∈₀
D.
q/12 ∈₀

Solution:

QUESTION: 57

An electron of charge e coulomb passes through a potential difference of V volt. Its energy in joule will be

A.
V/e
B.
1 e V
C.
e/V
D.
V

Solution:

QUESTION: 58

A hollow metal sphere of radious 10 cm is charged such that the potential on its surface is 80V. The potential at the centre of the sphere is

A.
zero
B.
80 V
C.
800 V
D.
8 V

Solution:

QUESTION: 59

A conducting sphere of radius 10 cm is charged with 10 μC. Another uncharged sphere of radius 20 cm in allowed to touch it for some time. If both the spheres are separated, then surface density of charges on the spheres will be in the ratio of

A.
1:4
B.
4:1
C.
1:2
D.
2:!

Solution:

QUESTION: 60

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is

A.
charge
B.
energy
C.
potential
D.
capacitance

Solution:

QUESTION: 61

A dielectric of thickness 5 cm and dielectric constant 10 is introduced in between the plates of a parallel plate capacitor having plate area 500 sq.cm and separation between plates 10 cm. The capacitance of the capacitor is ∈_o = 8.8x10^-12 SI unit

A.
8pF
B.
6pF
C.
4pF
D.
20pF

Solution:

QUESTION: 62

A straight wire of length 0.5 meter and carrying a current of 1.2 ampere is placed in a uniform magnetic field of induction 2 telsa. The magnetic field is perpendicular to the length of the wire. The force on the wire is

A.
2.4 N
B.
1.2 N
C.
3.0 N
D.
2.0 N

Solution:

QUESTION: 63

A chain reaction is fission of uranium is possible because

A.
large amount of energy is released
B.
Two intermediate sized nuclear fragments are formed
C.
More than one neutron is given out in each fission
D.
Fragments in fission are radioactive

Solution:

QUESTION: 64

The half life of a radioactive material depends on

A.
Temperature
B.
Pressure
C.
Nature of substance
D.
All of the above

Solution:

QUESTION: 65

The element which does not exhibit radioactivity is

A.
Radium
B.
Thorium
C.
Polonium
D.
Lead

Solution:

QUESTION: 66

The photoelectric work function for a metal surface is 4.125 eV. The cut off wavelength for this surface is

A.
4125 Å
B.
2062.5 Å
C.
3000 Å
D.
6000 Å

Solution:

Work function W₀ = hc/λ
∴ λ = hc/W_o = 12400/4.125 = 3000 Å

QUESTION: 67

Which of the following is not dependent on the intensity of incident radiation in a photoelectric experiment ?

A.
Work function of the surface
B.
Amount of photoelectric current
C.
Stopping potential will be reduced
D.
Maximum K.E. of photoelectrons

Solution:

QUESTION: 68

A man runs towards a mirror with a speed of 15 m-s^-1. What is the speed of his image?

A.
7.5 m-s^-1
B.
15 m-s^-1
C.
30 m-s^-1
D.
45 m-s^-1

Solution:

QUESTION: 69

Which of the following forms a perfect image free from all aberrations?

A.
plane mirror
B.
spherical lens
C.
cylindrical lens
D.
spherical mirror

Solution:

QUESTION: 70

A p-n junction is used as a/an

A.
rectifier
B.
amplifier
C.
oscillator
D.
modulator

Solution:

QUESTION: 71

A zener diode works on the principle of

A.
zero bias
B.
reverse bias
C.
forward bias
D.
infinite bias

Solution:

QUESTION: 72

An n-p-n transistor having a.c. current gain of 50 is to be used to make an amplifier of power gain of 300. What will be the voltage gain of the amplifier?

A.
8.5
B.
6
C.
4
D.
3

Solution:

QUESTION: 73

In a good conductor the energy gap between the conduction band and the valence band is

A.
Infinite
B.
Wide
C.
Narrow
D.
Zero

Solution:

QUESTION: 74

In an n-type semiconductor, which of the following is true?

A.
holes are majority charge carriers
B.
protons are majority charge carriers
C.
electrons are majority charge carriers
D.
electrons are minority charge carriers

Solution:

QUESTION: 75

When a semiconductor is heated, its resistance

A.
Decreases
B.
Increases
C.
Remains unchanged
D.
Nothing is definite

Solution:

QUESTION: 76

Wave optics is based on wave theory of light put forward by Huygen and modified later by

A.
Huygen
B.
Young
C.
Fresnel
D.
De Broglie

Solution:

QUESTION: 77

The sun is rotating about is own axis. The spectral lines emitted from the two ends of its equator, for an observer on the earth, will show

A.
no shift
B.
shift towards red end
C.
shift towards violet end
D.
shift towards red from one end shift towards violet from the other

Solution:

QUESTION: 78

In a semiconductor, separation of energy gap between conduction and valence bands is of the order of

A.
100 eV
B.
10 eV
C.
1 eV
D.
zero

Solution:

QUESTION: 79

The golden view of sea shell is due to

A.
diffraction
B.
dispersion
C.
polarisation
D.
reflection

Solution:

QUESTION: 80

In the propagation of light waves, the angle between the direction of vibration and plane of polarisation is

A.
0^o
B.
90^o
C.
45^o
D.
80^o

Solution:

QUESTION: 81

Which of the following does not give red ppt. with Fehling solution?

A.
Formaline
B.
Ethanal
C.
D-Glucose
D.
Acetone

Solution:

QUESTION: 82

Which of the following statements is correct regarding ease of dehydration?

A.
Primary > Secondary
B.
Secondary > Tertiary
C.
Tertiary > Primary
D.
None

Solution:

QUESTION: 83

An aldehyde on oxidation gives

A.
An alcohol
B.
An acid
C.
A ketone
D.
An ether

Solution:

QUESTION: 84

The reaction/method that does not give an alkane is

A.
Catalytic hydrogenation of alkenes
B.
Wurtz reaction
C.
kolbe's electrolytic method
D.
Dehydrohalogenation of an alkyl halide

Solution:

QUESTION: 85

Which of the following compounds does not react with NaHSO₃?

A.
C₆H₅CHO
B.
CH₃COC₆H₅
C.
Acetone
D.
Acetaldehyde

Solution:

QUESTION: 86

1-Butene may be converted to butane by reaction with

A.
Zn-HCl
B.
Sn-HCl
C.
Zn-Hg
D.
Pd/H₂

Solution:

QUESTION: 87

Scurvy is caused due to the deficiency of vitamin

A.
B₁
B.
C
C.
K
D.
D

Solution:

QUESTION: 88

The set of numerical coefficients that balances the chamical equation K₂CrO₄ + HCl → K₂Cr₂O₇ + KCl + H₂O

A.
1,1,2,2,1
B.
2,2,1,1,1
C.
2,1,1,2,1
D.
2,2,1,2,1

Solution:

QUESTION: 89

Irrespective of the source, pure sample of water always yields 88.89% mass of oxygen and 11.11% mass of hydrogen. This is explained by the law of

A.
conservation of mass
B.
constant composition
C.
multiple proportions
D.
constant volume

Solution:

QUESTION: 90

phospholipids are esters of glycerol with

A.
two carboxylic acid residues and one phosphate group
B.
one carboxylic acid residue and two phosphate groups
C.
three phosphate groups
D.
three carboxylic acid residues

Solution:

QUESTION: 91

Enzymes, in the living systems

A.
provide energy
B.
provide immunity
C.
transport oxygen
D.
catalyse biochemical processes

Solution:

QUESTION: 92

Identify the reaction in which the heat liberated corresponds to the heat of formation ( Δ H )

A.
C(diamond) + O₂ g → CO₂ g + heat
B.
2 H₂ g + O₂ g → 2 H₂O g + heat
C.
C(diamond) + 2H₂ g → CH₄g + heat
D.
S(rhombic) + O₂ g → SO₂ g + heat

Solution:

QUESTION: 93

Formic acid when treated with H₂SO₄ gives

A.
(COOH)₂
B.
CH₃COOH
C.
C₂H₅OH
D.
CO

Solution:

QUESTION: 94

When propanamide reacts with Br₂ and NaOH then which of the following compounds is formed ?

A.
Ethyl alcohol
B.
Propyl alcohol
C.
Propyl amine
D.
Ethylamine

Solution:

QUESTION: 95

Vinegar made from cane sugar, now-a-days synthetically contains

A.
Critic acid
B.
Lactic acid
C.
Acetic acid
D.
Palmitic acid

Solution:

QUESTION: 96

The rate, at which a substance reacts at constant temperature, depends upon its

A.
atomic mass
B.
active mass
C.
molecular mass
D.
equivalent mass

Solution:

QUESTION: 97

A liquid is in equilibrium with its vapour at its boiling point. The molecules in these two phases will have equal

A.
kinetic energy
B.
potential energy
C.
internal energy
D.
intermolecular energy

Solution:

QUESTION: 98

Which of the following is not correct?

A.
Dissolution of NH₄Cl in excess of water is an endothermic process
B.
Neutralisation process is always exothermic
C.
The absolute value of enthalpy (H) can be determined experimentally
D.
The heat of reaction at constant volume is denoted by Δ E

Solution:

QUESTION: 99

In which one the following reactions does the heat change represents the heat of formation of water

A.
2 H₂ + O₂ → 2 H₂O , Δ H = − 116 K . c a l
B.
H₂ + 1/2O₂ → H₂O , Δ H = − 58 K . c a l
C.
H⁺ + OH^- → H₂O , Δ H = − 13.7 K . c a l
D.
C₂ H₂ + 5/2 O₂ → 2CO₂ +H₂O , Δ H = − 310.62 K . c a l

Solution:

QUESTION: 100

Which of the following Fischer's projection formula is identical to D-glyceraldehyde ?

Solution:

QUESTION: 101

The propellants in which fuel and oxidiser are allowed to combine at the time of combustion are

A.
bipropellants
B.
monopropellants
C.
composite propellants
D.
double base propellants

Solution:

QUESTION: 102

If the pressure on a NaCl structure is increased, then its co-ordination number will

A.
increase
B.
decrease
C.
remain the same
D.
become zero

Solution:

QUESTION: 103

The IUPAC name of [Cr(NH₃)₆]³⁺is

A.
hexa ammine chromium (III) ion
B.
hexa ammine (III) chloride
C.
hexa ammine chromium (VI) ion
D.
hexa ammine chromium (V) ion

Solution:

QUESTION: 104

Alkyl cyanides are

A.
Less polar than alkyl isocyanides
B.
More polar than alkyl isocyanides
C.
Equally polar than alkyl isocyanides
D.
None of these

Solution:

QUESTION: 105

The colour of p-aminoazobenzene is

A.
Orange
B.
Congo red
C.
Bismark brown
D.
Indigo

Solution:

QUESTION: 106

If hydrogen electrode dipped into solution of pH = 3 and pH = 6 and salt bridge is connected the e.m.f. of resulting cell is

A.
0.177 V
B.
0.3 V
C.
0.052 V
D.
0.104 V

Solution:

QUESTION: 107

The standard oxidation no. of the most electronegative element in the products of the reaction BaO₂ and dil. H₂SO₄ is-

A.
0 and -1
B.
-1 and -2
C.
-2 and 0
D.
-2 and -1

Solution:

Reaction between BaO₂ and H₂SO₄ is
BaO₂ + H₂SO₄ → BaSO₄ + H₂O₂
The most electron negative element in products is oxygen
Oxidation no. of O in BaSO₄ and H₂O₂ is -2 and -1 respectively

QUESTION: 108

tert-Butyl methyl ether on heating with HI of one molar concentration gives

A.
CH₃OH +(CH₃)₃CI
B.
CH₃I +(CH₃)₃COH
C.
CH₃I +(CH₃)₃CI
D.
None of these

Solution:

QUESTION: 109

Standard electrode potentials are
Fe²⁺/Fe (E^o = -0.44 V)
Fe³⁺/Fe²⁺ (E^o = - 0.77 V)
Fe²⁺,Fe³⁺and Fe blocks are kept together,then

A.
Fe³⁺increases
B.
Fe³⁺ decreases
C.
Fe⁺²/Fe³⁺ remains unchanged
D.
Fe²⁺ decreases

Solution:

QUESTION: 110

The rate of diffusion of methane at a given temperature is twice that of a gas X. The molecular weight of X is

A.
64.0
B.
32.0
C.
4.0
D.
8.0

Solution:

QUESTION: 111

Nickel is purified by thermal decomposition of its

A.
Hydride
B.
Chloride
C.
Azide
D.
Carbonyl

Solution:

QUESTION: 112

Sodium hexametaphosphate is known as

A.
Calgon
B.
Natalite
C.
Permutit
D.
Nitrolim

Solution:

QUESTION: 113

In the chemical reaction Ag₂O + H₂O + 2e^- → 2Ag + 2OH^-

A.
Water is oxidised
B.
Silver is oxidised
C.
Hydrogen is reduced
D.
Silver is reduced

Solution:

QUESTION: 114

Silicon is an important constituent of

A.
Chlorophyll
B.
Haemoglobin
C.
Rocks
D.
Amalgams

Solution:

QUESTION: 115

What is the catalyst used during the manufacture of nitric acid by Ostwald's method ?

A.
Al₂O₃
B.
Fe
C.
V₂O₅
D.
Platinum gauge

Solution:

QUESTION: 116

The 8 : 8 type of packing is present in

A.
NaCl
B.
KCl
C.
CsCl
D.
MgF₂

Solution:

QUESTION: 117

Number of optically active isomers of tartaric acid

A.
2
B.
3
C.
4
D.
5

Solution:

QUESTION: 118

Bonding in ferric chloride is

A.
Covalent
B.
Ionic
C.
Co-ordinate
D.
None of the above

Solution:

QUESTION: 119

Which of the following is a hydrophilic colloidal sol?

A.
Barium sulphate sol
B.
Arsenious sulphide sol
C.
Starch sol
D.
Silver iodide sol

Solution:

QUESTION: 120

The metal which is not ferromagnetic is

A.
Iron
B.
Manganese
C.
Cobalt
D.
Nickel

Solution:

QUESTION: 121

Find the antonym of BASE

A.
Roof
B.
Height
C.
Top
D.
Climax

Solution:

QUESTION: 122

Fill in the blank with appropriate word.
The man is so ill that he can.........walk.

A.
hardly
B.
nearly
C.
quite
D.
rarely

Solution:

QUESTION: 123

Find the synonym of AUDACIOUS

A.
brilliant
B.
bold
C.
powerful
D.
frightening

Solution:

QUESTION: 124

Out of the given alternatives, choose the one which can be substituted for the given capitalised word.

He cannot MAKE BOTH ENDS MEET.

A.
manage the business
B.
work hard
C.
earn enough
D.
control affairs

Solution:

QUESTION: 125

Improve the sentence by choosing best alternative for capitalised part of the sentence.

When the solider returned home after the war was over, his wife received him WITH OPEN HANDS.

A.
with open arms
B.
with unfolded hands
C.
with an open heart
D.
No improvement

Solution:

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The sides of an equilateral triangle are increasing at the rate of 2 cm/sec. The rate at which the area increases, when the side is 10 cm is

The area bounded by the parabola x = 4 − y2 and the y-axis, in square units is

0.707

0.5

1

Zero

Increase in its velocity

Decreases in its velocity

Decrease in its frequency

Increase in its frequency

they will have equal charges

they will have same potential

both 1 and 2

none of these

is highly monochromatic

is highly coherent

is highly directional

can be sharply focussed

64 W

80 W

100 W

125 W

1.85 A

Greater than 1.85 A

Less than 1.85 A

None of these

Double

Quadrupled

Half

Four times less

Conversion of energy into electricity

Magnetic effects of current

Electromagnetic induction

Heat effects of current

dynamo

transformer

induction coil

electric heater

48 V

24 V

12 V

6 V

infrared radiations

ultraviolet radiations

X-rays

γ-rays

q/∈₀

q/2 ∈₀

q/6 ∈₀

q/12 ∈₀

V/e

1 e V

e/V

V

zero

80 V

800 V

8 V

1:4

4:1

1:2

2:!

charge

energy

potential

capacitance

2.4 N

1.2 N

3.0 N

2.0 N

large amount of energy is released

Two intermediate sized nuclear fragments are formed

More than one neutron is given out in each fission

Fragments in fission are radioactive

Temperature

Pressure

Nature of substance

All of the above

The area bounded by the parabola x = 4 − y² and the y-axis, in square units is