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

Charge on proton is

Question # 2

In 1932 Chadwick discovered

Question # 3

Proton was discovered by Rutherford in

Question # 4

Fraction of the decaying atoms per unit time is called

Question # 5

Mass of neutron is

Question # 6

There is present in paraffin a large amount of:

Question # 7

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

Question # 8

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

Question # 9

An alpha particle has a charge of

Question # 10

The half life of uranium-238 is

Question # 11

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

Question # 12

Phenomenon of radioactivity is due to disintegration of

Question # 13

The rate of decay of radioactive substance

Question # 14

Radium was discovered by:

Question # 15

Mass of proton is

Question # 16

The chemical properties of an element depends upon the number of

Question # 17

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 18

The number of protons inside a nucleus is called

Question # 19

Rutherford performed an experiment on nuclear reactions in:

Question # 20

Pair production take place when energy ofγ-rays photon is

Question # 21

The nucleus left after the emission of some radiation is called:

Question # 22

The range of particle depends upon the factor

Question # 23

Neutron was discovered in

Question # 24

When certain nucleus emits anα particle, its mass number:

Question # 25

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

Question # 26

Charge on neutron is

Question # 27

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 28

The reciprocal of decay constant λ of a radioactive material is:

Question # 29

Radioactivity was discovered by

Question # 30

Neutron was suggested to be in the nucleus by:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
2 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
3 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
4 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
5 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
6 Radiation detector are used to
A. measure intensity of radiation
B. measure energy of radiation
C. difference between different types of radiation
D. all the above
7 Pair production take place when energy ofγ-rays photon is
A. equal to 1.02 Mev-
B. greater than 1.02 Mev
C. less than 1.02 Mev
D. none of these
8 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
9 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
10 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these

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