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

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

Question # 2

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

Question # 3

The penetration power ofβ-particle is

Question # 4

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 5

In 1932 Chadwick discovered

Question # 6

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

Question # 7

Which of these is not a radiation detector

Question # 8

The range of particle depends upon the factor

Question # 9

After alpha decay the atomic number of the atom

Question # 10

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

Question # 11

Radioactivity was discovered by:

Question # 12

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

Question # 13

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

Question # 14

1 amu is equal to

Question # 15

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

Question # 16

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

Question # 17

γ-rays behave like a particle because they explain the

Question # 18

The rate of decay of a radioactive substance

Question # 19

Nucleus consists of

Question # 20

An alpha particle has a charge of

Question # 21

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

Question # 22

A mass spectrograph sort out

Question # 23

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

Question # 24

Curie is a unit of

Question # 25

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

Question # 26

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

Question # 27

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 28

Proton was discovered by Rutherford in

Question # 29

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

Question # 30

The number of isotopes of hydrogen are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
2 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
3 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
4 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
5 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
6 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
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 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
9 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
10 Mass of neutron is
A. 1.67 x 10-31kg
B. 1.67 x 10-27kg
C. 9.1 x 10-31kg
D. 1.67 x 10-19kg

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