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

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

Question # 2

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

Question # 3

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

Question # 4

Neon gas have three isotopes whose atomic numbers are

Question # 5

The unit of decay constant is:

Question # 6

How many isotopes of helium are present?

Question # 7

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

Question # 8

Which of these is not a radiation detector

Question # 9

Radiation detector are used to

Question # 10

The nucleus/nuclei of hydrogen is/are:

Question # 11

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

Question # 12

The energy acquired by a mass of 1g moving with the speed of light is

Question # 13

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

Question # 14

The number if neutrons in the nucleus of 92U235are

Question # 15

Curie is a unit of

Question # 16

Nuclei that have the same charge number but different mass number are called

Question # 17

Mass of neutron is

Question # 18

Which of the following material has longer half life

Question # 19

Radioactivity was discovered by

Question # 20

The half life of radioactive substances depends upon

Question # 21

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

Question # 22

γ-rays behave like a particle because they explain the

Question # 23

A pair of quark and antiquark makes a:

Question # 24

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

Question # 25

Nucleus of a hydrogen atom may contain:

Question # 26

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

Question # 27

How much time, theα-particle more massive than an electron

Question # 28

Radioactivity is

Question # 29

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

Question # 30

Gamma rays consist of steam of

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus
3 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
4 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
5 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
6 Referring to the above figure, we can say that of all the elements, the most stable element is
A. Phosphours
B. Iron
C. uranium
D. Lithium
7 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
8 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
9 Which of the following material has longer half life
A. radium
B. polonium
C. radium
D. uranium
10 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons

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