ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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ECAT Physics Chapter 21 Nuclear Physics

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Question # 1

When certain nucleus emits aβ-particles, is mass number:

Question # 2

Curie is a unit of

Question # 3

The rate of decay of a radioactive substance

Question # 4

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

Question # 5

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

Question # 6

The time required for a radioactive material to decrease in active by one half is called

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

Which of these is not a radiation detector

Question # 11

The nucleus/nuclei of hydrogen is/are:

Question # 12

Radioactivity

Question # 13

Marie curie and Pierre curie discovered:

Question # 14

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

Question # 15

After alpha decay the atomic number of the atom

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The time required for a radioactive material to decrease in active by one half is called
A. half time
B. half life
C. disintegration time
D. mean life
2 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
3 Which of the following material has longer half life
A. radium
B. polonium
C. radium
D. uranium
4 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
5 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
6 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
7 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
8 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
9 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
10 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these

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