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

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

Question # 2

When certain nucleus emits anα particle, its mass number:

Question # 3

The number if neutrons in the nucleus of 92U235are

Question # 4

The nucleus/nuclei of hydrogen is/are:

Question # 5

Rutherford performed an experiment on nuclear reactions in:

Question # 6

Nucleon means:

Question # 7

Radium was discovered by:

Question # 8

Beta particles are

Question # 9

Neutrons are

Question # 10

In 1932 Chadwick discovered

Question # 11

The unit of decay constant is:

Question # 12

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

Question # 13

In wilson cloud chamber, the air becomes saturated with:

Question # 14

Structure of the nucleus was explained by

Question # 15

Radioactivity

Question # 16

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

Question # 17

Phenomenon of radioactivity is due to disintegration of

Question # 18

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 19

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

Question # 20

A mass spectrograph sort out

Question # 21

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

Question # 22

The total charge of any nucleus is given as

Question # 23

Neutron was discovered by

Question # 24

The penetration power ofβ-particle is

Question # 25

The amount of energy equivalent to 1 a.m.u is

Question # 26

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

Question # 27

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

Question # 28

Radioactivity was discovered by:

Question # 29

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 30

The number of isotopes of hydrogen are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The range ofβ-particle in air is greater than that ofα-particle by
A. 1000 times
B. 100 times
C. 15 times
D. 10 times
2 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
3 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
4 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years
5 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
6 The amount of energy equivalent to 1 a.m.u is
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev
7 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
8 Which of the following material has longer half life
A. radium
B. polonium
C. radium
D. uranium
9 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C
10 The number of all the protons and neutrons in a nucleus is known as
A. atomic number
B. mass number
C. charge number
D. none of these

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