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 half life of uranium-238 is

Question # 2

The total charge of any nucleus is given as

Question # 3

Electrons are

Question # 4

The unit of decay constant is

Question # 5

Binding energy per nucleus is

Question # 6

An alpha particle has a charge of

Question # 7

How many isotopes of helium are present?

Question # 8

Radioactivity is

Question # 9

Marie curie and Pierre curie discovered:

Question # 10

The number if neutrons in the nucleus of 92U235are

Question # 11

The diameter of an atom is of the order

Question # 12

The chemical properties of all the isotopes of an elements are

Question # 13

Which of the following material has longer half life

Question # 14

There is present in paraffin a large amount of:

Question # 15

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

Question # 16

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 17

Nucleus of a hydrogen atom may contain:

Question # 18

The number of isotopes of hydrogen are

Question # 19

The nucleus/nuclei of hydrogen is/are:

Question # 20

Which are not the elementary particles?

Question # 21

Radioactivity was discovered by:

Question # 22

The half life of radioactive substances depends upon

Question # 23

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

Question # 24

The counter, which also provides the power to the G.M. tube is called:

Question # 25

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 26

Alfa particles are

Question # 27

The unit of decay constant is:

Question # 28

1 amu is equal to

Question # 29

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

Question # 30

The range ofβ-particle in air is greater than that ofα-particle by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
2 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian
3 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
4 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
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 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
7 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
8 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
9 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1
10 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these

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