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

Charge on neutron is

Question # 2

The figure 1.007276μ shows the mass of an:

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

Structure of the nucleus was explained by

Question # 9

Mass of proton is of order of

Question # 10

Marie curie and Pierre curie discovered:

Question # 11

In wilson cloud chamber, the air becomes saturated with:

Question # 12

Neutron was discovered in

Question # 13

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

Question # 14

A pair of quark and antiquark makes a:

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
2 According to Rutherford atomic model, the positive charge in an atom
A. is concentrated at its centre
B. is in the form of positive electron at same distance from its centre
C. is spread uniformly through its volume
D. none of these
3 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
4 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
5 Pair production take place when energy ofγ-rays photon is
A. equal to 1.02 Mev-
B. greater than 1.02 Mev
C. less than 1.02 Mev
D. none of these
6 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
7 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
8 Neutron was suggested to be in the nucleus by:
A. Rutherford in 1920
B. Bohar in 1913
C. Dirac in 1928
D. Anderson in 1932
9 For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is
A. A - Z
B. A
C. Z
D. A + Z
10 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford

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