ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

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ECAT Pre General Science Physics Chapter 21 Nuclear Physics

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Question # 1

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

Question # 2

β-particles are easily deflected by collisions than heavy

Question # 3

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 4

Radiation detector are used to

Question # 5

An alpha particle has a charge of

Question # 6

The chemical properties of an element depends upon the number of

Question # 7

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 8

Neutrons are

Question # 9

The half lie of radium-226 is

Question # 10

Three quarks make:

Question # 11

The nucleus left after the emission of some radiation is called:

Question # 12

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

Question # 13

Nuclei that have the same charge number but different mass number are called

Question # 14

The penetration power ofβ-particle is

Question # 15

The nucleus/nuclei of hydrogen is/are:

Question # 16

Rate of decay is actually described by.

Question # 17

Charge on proton is

Question # 18

The isotope/s of hydrogen is /are:

Question # 19

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

Question # 20

Radioactivity was discovered by

Question # 21

Fraction of the decaying atoms per unit time is called

Question # 22

γ-rays are

Question # 23

Alfa particles are

Question # 24

The number of isotopes of hydrogen are

Question # 25

Phenomenon of radioactivity is due to disintegration of

Question # 26

How many isotopes of helium are present?

Question # 27

Neon gas have three isotopes whose atomic numbers are

Question # 28

U-238 present in the natural uranium is about:

Question # 29

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

Question # 30

1 amu is equal to

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
2 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
3 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
4 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
5 When a charged particle passes through matter, it produces ionization, this effect is used in
A. fission reaction
B. reactor
C. radiation detector
D. fusion reaction
6 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
7 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
8 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
9 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
10 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

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