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

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

Question # 3

Rate of decay is actually described by.

Question # 4

γ-rays are

Question # 5

How many isotopes of helium are present?

Question # 6

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

Question # 7

Radium was discovered by:

Question # 8

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 9

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 10

Neutron was suggested to be in the nucleus by:

Question # 11

The unit of decay constant is

Question # 12

A curie represents a very strong source of

Question # 13

Radioactivity

Question # 14

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

Question # 15

For Protium, the mass defect is:

Question # 16

Electrons are

Question # 17

The isotope/s of hydrogen is /are:

Question # 18

The half life of uranium-238 is

Question # 19

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

Question # 20

In 1932 Chadwick discovered

Question # 21

1 amu is equal to.

Question # 22

The range of particle depends upon the factor

Question # 23

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

Question # 24

Proton was discovered by Rutherford in

Question # 25

Marie curie and Pierre curie discovered:

Question # 26

U-238 present in the natural uranium is about:

Question # 27

Neutron was discovered in

Question # 28

The most abundant isotope of neon is

Question # 29

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

Question # 30

Which of the following material has longer half life

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
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 range of particle depends upon the factor
A. charge, mass and energy of particle
B. density of medium
C. ionization potential of the atoms
D. all the above
4 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
5 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
6 1 amu is equal to
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-34kg
D. 1.66 x 10-27kg
7 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
8 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
9 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
10 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these

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