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

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Question # 1

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

Question # 2

A curie represents a very strong source of

Question # 3

The chemical properties of an element depends upon the number of

Question # 4

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

Question # 5

Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called

Question # 6

Structure of the nucleus was explained by

Question # 7

Neutron was suggested to be in the nucleus by:

Question # 8

The penetration power ofβ-particle is

Question # 9

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

Question # 10

The chemical properties of all the isotopes of an elements are

Question # 11

The number of protons inside a nucleus is called

Question # 12

Pair production take place when energy ofγ-rays photon is

Question # 13

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

Question # 14

Rutherford performed an experiment on nuclear reactions in:

Question # 15

An alpha particle has a charge of

Question # 16

The half life of radioactive substances depends upon

Question # 17

1 amu is equal to

Question # 18

U-238 present in the natural uranium is about:

Question # 19

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

Question # 20

Electrons are

Question # 21

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

Question # 22

The unit of decay constant is:

Question # 23

The chemical behaviour of an atom is determined by

Question # 24

Nucleus of a hydrogen atom may contain:

Question # 25

Radioactivity is

Question # 26

Charge on neutron is

Question # 27

There is present in paraffin a large amount of:

Question # 28

How many isotopes of helium are present?

Question # 29

Binding energy per nucleus is

Question # 30

Proton was discovered by Rutherford in

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The energy acquired by a mass of 1g moving with the speed of light is
A. 3 x 108J
B. 9 x 1013J
C. 3 x 1013J
D. 9 x 1016J
2 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
3 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
4 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
5 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
6 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric
7 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
8 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
9 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
10 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932

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