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

A mass spectrograph sort out

Question # 2

The half lie of radium-226 is

Question # 3

Alfa particles are

Question # 4

Phenomenon of radioactivity is due to disintegration of

Question # 5

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

Question # 6

Beta particles are

Question # 7

The number if neutrons in the nucleus of 92U235are

Question # 8

Neutron was discovered by

Question # 9

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 10

The figure 1.007276μ shows the mass of an:

Question # 11

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

Question # 12

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

Question # 13

Charge on proton is

Question # 14

The half life of radioactive substances depends upon

Question # 15

Neon gas have three isotopes whose atomic numbers are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
2 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
3 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these
4 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
5 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
6 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
A. nuclear fission
B. nuclear fusion
C. man defect
D. radioactivity
7 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
8 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
9 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
10 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5

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