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

Nucleus of a hydrogen atom may contain:

Question # 2

Which of the following material has smaller has life

Question # 3

There is present in paraffin a large amount of:

Question # 4

Which of the following material has longer half life

Question # 5

In 1932 Chadwick discovered

Question # 6

Which are not the elementary particles?

Question # 7

The energy acquired by a mass of 1g moving with the speed of light is

Question # 8

For Protium, the mass defect is:

Question # 9

Nucleon means:

Question # 10

Alfa particles are

Question # 11

The rate of decay of a radioactive substance

Question # 12

Mass of proton is of order of

Question # 13

Three quarks make:

Question # 14

Neutron was discovered by

Question # 15

The half life of radioactive substances depends upon

Question # 16

When certain nucleus emits anα particle, its mass number:

Question # 17

Mass of proton is

Question # 18

Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called

Question # 19

Neutrons are

Question # 20

After alpha decay the atomic number of the atom

Question # 21

Which of these is not a radiation detector

Question # 22

A mass spectrograph sort out

Question # 23

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

Question # 24

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

Question # 25

Radioactivity

Question # 26

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

Question # 27

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

Question # 28

Radioactivity was discovered by

Question # 29

Gamma rays consist of steam of

Question # 30

Radioactivity was discovered by:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
2 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
3 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
4 Radioactivity
A. is exhibited more by semiconductors in general
B. in exhibited more by the element when they are coupled
C. with other radioactive elements by a covalent bond
D. is an atomic property of radioactive elements
5 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
6 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
7 Charge on proton is
A. 1.59 x 10-9C
B. 1.59 x 10-7C
C. -1.59 x 10-19 C
D. 1.59 x 10-19C
8 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
9 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
10 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

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