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

The range of particle depends upon the factor

Question # 2

Nuclei that have the same charge number but different mass number are called

Question # 3

The penetration power ofβ-particle is

Question # 4

β-particles are easily deflected by collisions than heavy

Question # 5

The chemical properties of an element depends upon the number of

Question # 6

The half life of uranium-238 is

Question # 7

Which of these is not a radiation detector

Question # 8

Neutrons are

Question # 9

The half lie of radium-226 is

Question # 10

The number of isotopes of hydrogen are

Question # 11

The diameter of an atom is of the order

Question # 12

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

Question # 13

Phenomenon of radioactivity is due to disintegration of

Question # 14

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

Question # 15

Neon gas have three isotopes whose atomic numbers are

Question # 16

Neutron was discovered in

Question # 17

The reciprocal of decay constant λ of a radioactive material is:

Question # 18

Which of the following material has smaller has life

Question # 19

Fraction of the decaying atoms per unit time is called

Question # 20

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

Question # 21

The rate of decay of radioactive substance

Question # 22

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 23

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

Question # 24

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

Question # 25

Mass of proton is

Question # 26

The nucleus/nuclei of hydrogen is/are:

Question # 27

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

Question # 28

Curie is a unit of

Question # 29

Radiation detector are used to

Question # 30

Nucleus of a hydrogen atom may contain:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
2 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
3 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
4 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
5 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
6 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
7 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
8 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
9 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
10 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV

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