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

Proton was discovered by Rutherford in

Question # 2

Mass of proton is of order of

Question # 3

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

Question # 4

Different radioactive material have

Question # 5

In wilson cloud chamber, the air becomes saturated with:

Question # 6

Charge on neutron is

Question # 7

Rutherford performed an experiment on nuclear reactions in:

Question # 8

Charge on proton is

Question # 9

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

Question # 10

In 1932 Chadwick discovered

Question # 11

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

Question # 12

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

Question # 13

Gamma rays consist of steam of

Question # 14

The half life of radioactive substances depends upon

Question # 15

Three quarks make:

Question # 16

The figure 1.007276μ shows the mass of an:

Question # 17

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

Question # 18

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

Question # 19

After alpha decay the atomic number of the atom

Question # 20

Nucleus consists of

Question # 21

γ-rays behave like a particle because they explain the

Question # 22

Mass of neutron is

Question # 23

1 amu is equal to.

Question # 24

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

Question # 25

Fraction of the decaying atoms per unit time is called

Question # 26

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

Question # 27

The half lie of radium-226 is

Question # 28

Alfa particles are

Question # 29

Marie curie and Pierre curie discovered:

Question # 30

The energy is found from Einstein's mass energy relation is called

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
2 The energy acquired by a mass of 1g moving with the speed of light is
A. 3 x 108J
B. 9 x 1013J
C. 3 x 1013J
D. 9 x 1016J
3 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
4 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is
A. A - Z
B. A + Z
C. Z
D. A
5 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
6 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
7 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
8 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four
9 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
10 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932

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