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

Neutrons are

Question # 2

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

Question # 3

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

Question # 4

Radioactivity was discovered by:

Question # 5

Mass of neutron is

Question # 6

Rutherford performed an experiment on nuclear reactions in:

Question # 7

Charge on neutron is

Question # 8

There is present in paraffin a large amount of:

Question # 9

The number of isotopes of hydrogen are

Question # 10

The half lie of radium-226 is

Question # 11

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 12

A curie represents a very strong source of

Question # 13

Alfa particles are

Question # 14

1 amu is equal to

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 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
2 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
3 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
4 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
5 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
6 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
7 1 amu is equal to.
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-24kg
D. 1.66 x 10-27kg
8 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
9 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
10 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927

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