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

1 amu is equal to

Question # 2

Neutron was discovered in

Question # 3

After alpha decay the atomic number of the atom

Question # 4

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

Question # 5

Neon gas have three isotopes whose atomic numbers are

Question # 6

In wilson cloud chamber, the air becomes saturated with:

Question # 7

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 8

Pair production take place when energy ofγ-rays photon is

Question # 9

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

Question # 10

The most abundant isotope of neon is

Question # 11

Neutrons are

Question # 12

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 13

Which of these is not a radiation detector

Question # 14

Radioactivity was discovered by

Question # 15

The rate of decay of a radioactive substance

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Charge on proton is
A. 1.59 x 10-9C
B. 1.59 x 10-7C
C. -1.59 x 10-19 C
D. 1.59 x 10-19C
2 The number of all the protons and neutrons in a nucleus is known as
A. atomic number
B. mass number
C. charge number
D. none of these
3 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
4 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
5 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
6 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
7 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
A. deuterium
B. protium
C. tritium
D. none of these
8 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
9 1 amu is equal to
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-34kg
D. 1.66 x 10-27kg
10 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life

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