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

When certain nucleus emits aβ-particles, is mass number:

Question # 2

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

Question # 3

The emission of radiations take place in elements, having charge number greater than

Question # 4

The half lie of radium-226 is

Question # 5

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 6

Rate of decay is actually described by.

Question # 7

The range of particle depends upon the factor

Question # 8

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

Question # 9

The counter, which also provides the power to the G.M. tube is called:

Question # 10

Radium was discovered by:

Question # 11

Different radioactive material have

Question # 12

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

Question # 13

Curie is a unit of

Question # 14

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 15

Radiation detector are used to

Question # 16

Charge on proton is

Question # 17

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 18

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

Question # 19

The chemical behaviour of an atom is determined by

Question # 20

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

Question # 21

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

Question # 22

When certain nucleus emits anα particle, its mass number:

Question # 23

According to Rutherford atomic model, the positive charge in an atom

Question # 24

A mass spectrograph sort out

Question # 25

Proton was discovered by Rutherford in

Question # 26

Examples of moderators used in a fission reactor is/are:

Question # 27

Alfa particles are

Question # 28

Beta particles are

Question # 29

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

Question # 30

The half life of uranium-238 is

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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 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
3 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
4 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
5 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
6 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
7 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
8 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
9 Which of the following material has longer half life
A. radium
B. polonium
C. radium
D. uranium
10 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams

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