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

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

Question # 2

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

Question # 3

Nucleus of a hydrogen atom may contain:

Question # 4

A mass spectrograph sort out

Question # 5

In wilson cloud chamber, the air becomes saturated with:

Question # 6

Neutron was discovered by

Question # 7

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

Question # 8

The chemical behaviour of an atom is determined by

Question # 9

Mass of proton is

Question # 10

There is present in paraffin a large amount of:

Question # 11

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 12

Beta particles are

Question # 13

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 14

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

Question # 15

For Protium, the mass defect is:

Question # 16

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

Question # 17

The rate of decay of radioactive substance

Question # 18

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 19

Which are not the elementary particles?

Question # 20

The figure 1.007276μ shows the mass of an:

Question # 21

The unit of decay constant is

Question # 22

β-particles are easily deflected by collisions than heavy

Question # 23

The chemical properties of an element depends upon the number of

Question # 24

The half life of radioactive substances depends upon

Question # 25

1 amu is equal to

Question # 26

Radioactivity is

Question # 27

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

Question # 28

Neutron was discovered in

Question # 29

The unit of decay constant is:

Question # 30

Marie curie and Pierre curie discovered:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
2 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
3 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
4 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
5 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian
6 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
7 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
A. deuteron
B. deterium
C. protium
D. tritium
8 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
9 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
10 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52

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