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

Different radioactive material have

Question # 2

Phenomenon of radioactivity is due to disintegration of

Question # 3

Radium was discovered by:

Question # 4

Mass of neutron is

Question # 5

When certain nucleus emits anα particle, its mass number:

Question # 6

1 amu is equal to.

Question # 7

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

Question # 8

The diameter of an atom is of the order

Question # 9

Structure of the nucleus was explained by

Question # 10

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

Question # 11

γ-rays behave like a particle because they explain the

Question # 12

Nucleus of a hydrogen atom may contain:

Question # 13

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

Question # 14

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 15

There is present in paraffin a large amount of:

Question # 16

The rate of decay of a radioactive substance

Question # 17

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

Question # 18

Neutron was discovered by

Question # 19

Nuclei that have the same charge number but different mass number are called

Question # 20

Neutron was suggested to be in the nucleus by:

Question # 21

Rutherford performed an experiment on nuclear reactions in:

Question # 22

The total charge of any nucleus is given as

Question # 23

Proton was discovered by Rutherford in

Question # 24

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

Question # 25

β-particles are easily deflected by collisions than heavy

Question # 26

Binding energy per nucleus is

Question # 27

Gamma rays consist of steam of

Question # 28

An alpha particle has a charge of

Question # 29

Which of the following material has smaller has life

Question # 30

Three quarks make:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
2 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
3 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
4 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
A. nuclear fission
B. nuclear fusion
C. man defect
D. radioactivity
5 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
6 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
7 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
8 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
9 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
10 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time

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