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

Binding energy per nucleus is

Question # 2

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 3

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

Question # 4

Radium was discovered by:

Question # 5

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

Question # 6

Radioactivity is

Question # 7

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

Question # 8

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

Question # 9

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 10

The chemical properties of all the isotopes of an elements are

Question # 11

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 12

1 amu is equal to.

Question # 13

The unit of decay constant is

Question # 14

A curie represents a very strong source of

Question # 15

Which are not the elementary particles?

Question # 16

The number if neutrons in the nucleus of 92U235are

Question # 17

Marie curie and Pierre curie discovered:

Question # 18

Which of the following material has longer half life

Question # 19

The chemical behaviour of an atom is determined by

Question # 20

Nucleus of a hydrogen atom may contain:

Question # 21

Pair production take place when energy ofγ-rays photon is

Question # 22

Neutrons are

Question # 23

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

Question # 24

γ-rays behave like a particle because they explain the

Question # 25

Neutron was discovered by

Question # 26

Nucleus consists of

Question # 27

Mass of neutron is

Question # 28

The half life of radioactive substances depends upon

Question # 29

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

Question # 30

Alfa particles are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The counter, which also provides the power to the G.M. tube is called:
A. Thin mica window
B. thin glass window
C. Airy window
D. Wooden window
2 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron
3 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
4 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
5 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
6 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
7 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
8 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
9 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
10 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these

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