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

Which of the following material has longer half life

Question # 3

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

Question # 4

The number of all the protons and neutrons in a nucleus is known as

Question # 5

Structure of the nucleus was explained by

Question # 6

Gamma rays consist of steam of

Question # 7

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

Question # 8

Radium was discovered by:

Question # 9

The number if neutrons in the nucleus of 92U235are

Question # 10

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

Question # 11

In 1932 Chadwick discovered

Question # 12

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

Question # 13

Alfa particles are

Question # 14

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

Question # 15

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 In radio-active decay, the original element which disintegrate to another element is called
A. element
B. daughter element
C. parent element
D. none of these
2 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
3 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
4 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
5 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
6 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
7 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
8 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
9 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
10 Mass of neutron is
A. 1.67 x 10-31kg
B. 1.67 x 10-27kg
C. 9.1 x 10-31kg
D. 1.67 x 10-19kg

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