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

Rate of decay is actually described by.

Question # 2

Phenomenon of radioactivity is due to disintegration of

Question # 3

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

Question # 4

Heavy water is made of one oxygen atom and two atoms of:

Question # 5

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

Question # 6

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

Question # 7

A curie represents a very strong source of

Question # 8

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

Question # 9

Neutron was discovered by

Question # 10

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

Question # 11

Different radioactive material have

Question # 12

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

Question # 13

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

Question # 14

Which are not the elementary particles?

Question # 15

β-particles are easily deflected by collisions than heavy

Question # 16

After alpha decay the atomic number of the atom

Question # 17

1 amu is equal to.

Question # 18

Nucleus of a hydrogen atom may contain:

Question # 19

When a charged particle passes through matter, it produces ionization, this effect is used in

Question # 20

Radium was discovered by:

Question # 21

The half lie of radium-226 is

Question # 22

Structure of the nucleus was explained by

Question # 23

Neutrons are

Question # 24

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

Question # 25

Alfa particles are

Question # 26

Which of the following material has smaller has life

Question # 27

The penetration power ofβ-particle is

Question # 28

Fraction of the decaying atoms per unit time is called

Question # 29

Radioactivity is

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
3 The number of all the protons and neutrons in a nucleus is known as
A. atomic number
B. mass number
C. charge number
D. none of these
4 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
5 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
6 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
7 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
8 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
9 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
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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