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

Mass of proton is

Question # 2

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

Question # 3

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

Question # 4

Rutherford performed an experiment on nuclear reactions in:

Question # 5

An alpha particle has a charge of

Question # 6

The number if neutrons in the nucleus of 92U235are

Question # 7

1 amu is equal to.

Question # 8

The emission of radiations take place in elements, having charge number greater than

Question # 9

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

Question # 10

Radioactivity is

Question # 11

Nucleus of a hydrogen atom may contain:

Question # 12

Which are not the elementary particles?

Question # 13

The rate of decay of radioactive substance

Question # 14

The penetration power ofβ-particle is

Question # 15

The chemical behaviour of an atom is determined by

Question # 16

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

Question # 17

Three quarks make:

Question # 18

Radioactivity was discovered by:

Question # 19

When certain nucleus emits anα particle, its mass number:

Question # 20

How much time, theα-particle more massive than an electron

Question # 21

The rate of decay of a radioactive substance

Question # 22

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

Question # 23

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

Question # 24

Radioactivity

Question # 25

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

Question # 26

Neutron was suggested to be in the nucleus by:

Question # 27

Mass of proton is of order of

Question # 28

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

Question # 29

The counter, which also provides the power to the G.M. tube is called:

Question # 30

Fraction of the decaying atoms per unit time is called

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ECAT Class Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 Which of the following material has longer half life
A. radium
B. polonium
C. radium
D. uranium
3 1 amu is equal to
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-34kg
D. 1.66 x 10-27kg
4 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
5 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
6 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
7 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
8 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
9 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
10 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these

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