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

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

Question # 2

Neutron was suggested to be in the nucleus by:

Question # 3

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

Question # 4

Neutron was discovered by

Question # 5

Which are not the elementary particles?

Question # 6

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

Question # 7

The half life of radioactive substances depends upon

Question # 8

Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called

Question # 9

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

Question # 10

A particle having the mass of electron and charge of a proton is called a

Question # 11

A mass spectrograph sort out

Question # 12

The emission of radiations take place in elements, having charge number greater than

Question # 13

A curie represents a very strong source of

Question # 14

The time required for a radioactive material to decrease in active by one half is called

Question # 15

A pair of quark and antiquark makes a:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
2 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
3 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
4 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
5 Mass of proton is
A. 1.67 x 10-27kg
B. 1.67 x 10-31kg
C. 1.66 x 10-34kg
D. 1.67 x 10-17kg
6 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
7 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
8 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C
9 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
10 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino

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