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

00:00
Question # 1

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

Question # 2

The isotope/s of hydrogen is /are:

Question # 3

The rate of decay of radioactive substance

Question # 4

Which are not the elementary particles?

Question # 5

γ-rays are

Question # 6

Binding energy per nucleus is

Question # 7

Beta particles are

Question # 8

There is present in paraffin a large amount of:

Question # 9

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

Question # 10

The chemical properties of all the isotopes of an elements are

Question # 11

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

Question # 12

Mass of neutron is

Question # 13

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

Question # 14

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

Question # 15

Mass of proton is of order of

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
2 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
3 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
4 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C
5 Mass of neutron is
A. 1.67 x 10-31kg
B. 1.67 x 10-27kg
C. 9.1 x 10-31kg
D. 1.67 x 10-19kg
6 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
7 Alfa , beta and gamma rays are emitted from a radio-active substance
A. spontaneously
B. when it is heated
C. when it is exposed to light
D. When it interacts with the other particle
8 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
9 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1
10 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity

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