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

00:00
Question # 1

The half life of radioactive substances depends upon

Question # 2

Neutron was discovered in

Question # 3

Radioactivity

Question # 4

Radioactivity is

Question # 5

Rutherford performed an experiment on nuclear reactions in:

Question # 6

Which are not the elementary particles?

Question # 7

Fraction of the decaying atoms per unit time is called

Question # 8

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 9

When a nucleus emits an alpha particles, its charge number decreases by

Question # 10

Mass of neutron is

Question # 11

Charge on neutron is

Question # 12

The amount of energy equivalent to 1 a.m.u is

Question # 13

For Protium, the mass defect is:

Question # 14

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 15

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

Question # 16

Nucleus of a hydrogen atom may contain:

Question # 17

Neon gas have three isotopes whose atomic numbers are

Question # 18

Which of the following material has smaller has life

Question # 19

The time required for a radioactive material to decrease in active by one half is called

Question # 20

1 amu is equal to

Question # 21

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

Question # 22

γ-rays are

Question # 23

When certain nucleus emits aβ-particles, is mass number:

Question # 24

The range ofβ-particle in air is greater than that ofα-particle by

Question # 25

Neutron was discovered by

Question # 26

When certain nucleus emits anα particle, its mass number:

Question # 27

Neutrons are

Question # 28

β-particles are easily deflected by collisions than heavy

Question # 29

The penetration power ofβ-particle is

Question # 30

In radio-active decay, the original element which disintegrate to another element is called

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
2 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
3 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
4 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1
5 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
6 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years
7 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
8 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
9 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
10 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four

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