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

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

Question # 2

Gamma rays consist of steam of

Question # 3

The number of all the protons and neutrons in a nucleus is known as

Question # 4

The chemical behaviour of an atom is determined by

Question # 5

Nucleus of a hydrogen atom may contain:

Question # 6

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

Question # 7

The nucleus/nuclei of hydrogen is/are:

Question # 8

Beta particles are

Question # 9

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

Question # 10

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

Question # 11

The half lie of radium-226 is

Question # 12

Radium was discovered by:

Question # 13

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

Question # 14

Binding energy per nucleus is

Question # 15

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 16

The range of particle depends upon the factor

Question # 17

Neon gas have three isotopes whose atomic numbers are

Question # 18

The rate of decay of a radioactive substance

Question # 19

The penetration power ofβ-particle is

Question # 20

Rutherford performed an experiment on nuclear reactions in:

Question # 21

Neutrons are

Question # 22

Pair production take place when energy ofγ-rays photon is

Question # 23

Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called

Question # 24

For Protium, the mass defect is:

Question # 25

Radioactivity is

Question # 26

Electrons are

Question # 27

The number if neutrons in the nucleus of 92U235are

Question # 28

Curie is a unit of

Question # 29

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

Question # 30

Radiation detector are used to

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
2 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian
3 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%
4 Referring to the above figure, we can say that of all the elements, the most stable element is
A. Phosphours
B. Iron
C. uranium
D. Lithium
5 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
6 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
7 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
8 For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is
A. A - Z
B. A
C. Z
D. A + Z
9 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
10 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon

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