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

Electrons are

Question # 2

Radioactivity was discovered by

Question # 3

The amount of energy equivalent to 1 a.m.u is

Question # 4

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 5

Different radioactive material have

Question # 6

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

Question # 7

The number if neutrons in the nucleus of 92U235are

Question # 8

Neon gas have three isotopes whose atomic numbers are

Question # 9

The rate of decay of radioactive substance

Question # 10

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

Question # 11

There is present in paraffin a large amount of:

Question # 12

In 1932 Chadwick discovered

Question # 13

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

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
2 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
3 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
4 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
5 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
6 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C
7 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
8 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
9 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
10 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these

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