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

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

Question # 2

Mass of proton is

Question # 3

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

Question # 4

The chemical behaviour of an atom is determined by

Question # 5

Fraction of the decaying atoms per unit time is called

Question # 6

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 # 7

1 amu is equal to

Question # 8

The figure 1.007276μ shows the mass of an:

Question # 9

A mass spectrograph sort out

Question # 10

The time required for a radioactive material to decrease in active by one half is called

Question # 11

There is present in paraffin a large amount of:

Question # 12

Structure of the nucleus was explained by

Question # 13

Pair production take place when energy ofγ-rays photon is

Question # 14

Curie is a unit of

Question # 15

An alpha particle has a charge of

Question # 16

Radioactivity was discovered by

Question # 17

For Protium, the mass defect is:

Question # 18

The rate of decay of a radioactive substance

Question # 19

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 20

Rate of decay is actually described by.

Question # 21

Which of these is not a radiation detector

Question # 22

Marie curie and Pierre curie discovered:

Question # 23

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

Question # 24

Radium was discovered by:

Question # 25

Neutron was disvovered by:

Question # 26

Which of the following material has smaller has life

Question # 27

The unit of decay constant is:

Question # 28

The half life of radioactive substances depends upon

Question # 29

Phenomenon of radioactivity is due to disintegration of

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
2 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
3 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four
4 Mass of proton is
A. 1.67 x 10-27kg
B. 1.67 x 10-31kg
C. 1.66 x 10-34kg
D. 1.67 x 10-17kg
5 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
6 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
7 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
8 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV
9 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
10 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian

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