ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

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ECAT Pre General Science Physics Chapter 21 Nuclear Physics

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Question # 1

Mass of neutron is

Question # 2

The number if neutrons in the nucleus of 92U235are

Question # 3

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 4

Which of the following material has smaller has life

Question # 5

The half life of uranium-238 is

Question # 6

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 7

The range of particle depends upon the factor

Question # 8

Radioactivity is

Question # 9

When a nucleus emits an alpha particle, it atomic mass decreased by

Question # 10

After alpha decay the atomic number of the atom

Question # 11

β-particles are easily deflected by collisions than heavy

Question # 12

The number of protons inside a nucleus is called

Question # 13

When certain nucleus emits anα particle, its mass number:

Question # 14

Marie curie and Pierre curie discovered:

Question # 15

The reciprocal of decay constant λ of a radioactive material is:

Question # 16

Curie is a unit of

Question # 17

Proton was discovered by Rutherford in

Question # 18

The rate of decay of a radioactive substance

Question # 19

Neutron was suggested to be in the nucleus by:

Question # 20

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 21

The nucleus left after the emission of some radiation is called:

Question # 22

The figure 1.007276μ shows the mass of an:

Question # 23

In 1932 Chadwick discovered

Question # 24

The rate of decay of radioactive substance

Question # 25

The most abundant isotope of neon is

Question # 26

Different radioactive material have

Question # 27

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 28

A particle having the mass of electron and charge of a proton is called a

Question # 29

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 30

1 amu is equal to.

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The amount of energy equivalent to 1 a.m.u is
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev
2 The distance travelled byα-particle in a medium before coming to rest, is called
A. range ofγ-particle
B. range of neutrons
C. range of particle
D. none of these
3 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
4 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
5 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C
6 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
7 1 amu is equal to.
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-24kg
D. 1.66 x 10-27kg
8 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
9 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
10 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle

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