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

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

Question # 2

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

Alfa particles are

Question # 7

Fraction of the decaying atoms per unit time is called

Question # 8

Radioactivity is

Question # 9

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

Question # 10

Which of the following material has smaller has life

Question # 11

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

Question # 12

Heavy water is made of one oxygen atom and two atoms of:

Question # 13

There is present in paraffin a large amount of:

Question # 14

According to Rutherford atomic model, the positive charge in an atom

Question # 15

Which of these is not a radiation detector

Question # 16

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 17

Radioactivity was discovered by

Question # 18

The total charge of any nucleus is given as

Question # 19

The chemical properties of an element depends upon the number of

Question # 20

The penetration power ofβ-particle is

Question # 21

Proton was discovered by Rutherford in

Question # 22

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

Question # 23

Nucleus of a hydrogen atom may contain:

Question # 24

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

Question # 25

Charge on neutron is

Question # 26

γ-rays are

Question # 27

When certain nucleus emits anα particle, its mass number:

Question # 28

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

Question # 29

Phenomenon of radioactivity is due to disintegration of

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 The distance travelled byα-particle in a medium before coming to rest, is called
A. range ofγ-particle
B. range of neutrons
C. range of particle
D. none of these
3 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
4 In radioactive decay, the new element which is formed due to the disintegration of original element is called
A. element
B. daughter element
C. parent element
D. none of these
5 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
6 When a charged particle passes through matter, it produces ionization, this effect is used in
A. fission reaction
B. reactor
C. radiation detector
D. fusion reaction
7 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
8 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
9 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
10 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is
A. A - Z
B. A + Z
C. Z
D. A

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