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

The number of all the protons and neutrons in a nucleus is known as

Question # 2

Binding energy per nucleus is

Question # 3

The penetration power ofβ-particle is

Question # 4

The most abundant isotope of neon is

Question # 5

Marie curie and Pierre curie discovered:

Question # 6

When certain nucleus emits anα particle, its mass number:

Question # 7

There is present in paraffin a large amount of:

Question # 8

Gamma rays consist of steam of

Question # 9

The rate of decay of a radioactive substance

Question # 10

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 11

The half lie of radium-226 is

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

The half life of uranium-238 is

Question # 16

Nucleus of a hydrogen atom may contain:

Question # 17

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

Question # 18

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

Question # 19

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

Question # 20

The number if neutrons in the nucleus of 92U235are

Question # 21

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

Question # 22

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

Question # 23

Three quarks make:

Question # 24

The range of particle depends upon the factor

Question # 25

Charge on neutron is

Question # 26

An alpha particle has a charge of

Question # 27

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

Question # 28

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

Question # 29

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

Question # 30

The half life of radioactive substances depends upon

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
2 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
3 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
4 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
5 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
6 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
7 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
8 Which of the following material has longer half life
A. radium
B. polonium
C. radium
D. uranium
9 According to Rutherford atomic model, the positive charge in an atom
A. is concentrated at its centre
B. is in the form of positive electron at same distance from its centre
C. is spread uniformly through its volume
D. none of these
10 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass

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