ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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ECAT Physics Chapter 21 Nuclear Physics

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Question # 1

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

Question # 2

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

Question # 3

When certain nucleus emits anα particle, its mass number:

Question # 4

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

Question # 5

The unit of decay constant is

Question # 6

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

Question # 7

Proton was discovered by Rutherford in

Question # 8

Radiation detector are used to

Question # 9

Different radioactive material have

Question # 10

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

Question # 11

In radio-active decay, the original element which disintegrate to another element is called

Question # 12

β-particles are easily deflected by collisions than heavy

Question # 13

Which are not the elementary particles?

Question # 14

Gamma rays consist of steam of

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
2 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
3 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus
4 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
5 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric
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 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
8 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
9 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
10 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

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