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

After alpha decay the atomic number of the atom

Question # 2

Neutrons are

Question # 3

Different radioactive material have

Question # 4

Electrons are

Question # 5

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 6

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

Question # 7

The total charge of any nucleus is given as

Question # 8

Marie curie and Pierre curie discovered:

Question # 9

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

Question # 10

Neutron was disvovered by:

Question # 11

Which of the following material has longer half life

Question # 12

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

Question # 13

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

Question # 14

Rutherford performed an experiment on nuclear reactions in:

Question # 15

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

Question # 16

The figure 1.007276μ shows the mass of an:

Question # 17

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

Question # 18

For Protium, the mass defect is:

Question # 19

How many isotopes of helium are present?

Question # 20

Proton was discovered by Rutherford in

Question # 21

Mass of proton is

Question # 22

Which of these is not a radiation detector

Question # 23

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

Question # 24

Radiation detector are used to

Question # 25

The number of isotopes of hydrogen are

Question # 26

Nucleus of a hydrogen atom may contain:

Question # 27

The half lie of radium-226 is

Question # 28

The rate of decay of radioactive substance

Question # 29

The unit of decay constant is:

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
2 In radioactive decay, the new element which is formed due to the disintegration of original element is called
A. element
B. daughter element
C. parent element
D. none of these
3 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron
4 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
5 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
6 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
7 1 amu is equal to.
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-24kg
D. 1.66 x 10-27kg
8 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
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 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
A. deuterium
B. protium
C. tritium
D. none of these

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