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

The rate of decay of radioactive substance

Question # 2

According to Rutherford atomic model, the positive charge in an atom

Question # 3

Nucleus of a hydrogen atom may contain:

Question # 4

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

Question # 5

Rutherford performed an experiment on nuclear reactions in:

Question # 6

The chemical behaviour of an atom is determined by

Question # 7

Proton was discovered by Rutherford in

Question # 8

Examples of moderators used in a fission reactor is/are:

Question # 9

The energy acquired by a mass of 1g moving with the speed of light is

Question # 10

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

Question # 11

The number of isotopes of hydrogen are

Question # 12

When certain nucleus emits anα particle, its mass number:

Question # 13

Neutron was disvovered by:

Question # 14

A pair of quark and antiquark makes a:

Question # 15

Marie curie and Pierre curie discovered:

Question # 16

Curie is a unit of

Question # 17

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

Question # 18

The penetration power ofβ-particle is

Question # 19

A curie represents a very strong source of

Question # 20

Mass of proton is of order of

Question # 21

Radioactivity

Question # 22

Nuclei that have the same charge number but different mass number are called

Question # 23

For Protium, the mass defect is:

Question # 24

Neutrons are

Question # 25

γ-rays behave like a particle because they explain the

Question # 26

Charge on neutron is

Question # 27

After alpha decay the atomic number of the atom

Question # 28

Which of the following material has smaller has life

Question # 29

Fraction of the decaying atoms per unit time is called

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
2 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
3 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
4 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
5 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
6 In radio-active decay, the original element which disintegrate to another element is called
A. element
B. daughter element
C. parent element
D. none of these
7 Alfa , beta and gamma rays are emitted from a radio-active substance
A. spontaneously
B. when it is heated
C. when it is exposed to light
D. When it interacts with the other particle
8 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
9 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
10 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes

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