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

Which are not the elementary particles?

Question # 2

According to Rutherford atomic model, the positive charge in an atom

Question # 3

The chemical behaviour of an atom is determined by

Question # 4

The total charge of any nucleus is given as

Question # 5

Nucleus of a hydrogen atom may contain:

Question # 6

Binding energy per nucleus is

Question # 7

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

Question # 8

The chemical properties of an element depends upon the number of

Question # 9

Curie is a unit of

Question # 10

The diameter of an atom is of the order

Question # 11

Neutron was disvovered by:

Question # 12

The half life of radioactive substances depends upon

Question # 13

Mass of neutron is

Question # 14

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 15

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

Question # 16

The number of isotopes of hydrogen are

Question # 17

Radioactivity

Question # 18

Mass of proton is of order of

Question # 19

Charge on neutron is

Question # 20

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

Question # 21

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

Question # 22

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

Question # 23

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

Question # 24

Pair production take place when energy ofγ-rays photon is

Question # 25

A pair of quark and antiquark makes a:

Question # 26

The figure 1.007276μ shows the mass of an:

Question # 27

Radiation detector are used to

Question # 28

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

Question # 29

The rate of decay of a radioactive substance

Question # 30

Phenomenon of radioactivity is due to disintegration of

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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 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
3 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
4 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
5 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
6 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
7 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
8 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
9 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
10 For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is
A. A - Z
B. A
C. Z
D. A + Z

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