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

Different radioactive material have

Question # 2

Mass of proton is

Question # 3

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 4

The unit of decay constant is:

Question # 5

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

Question # 6

Neutrons are

Question # 7

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

Question # 8

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

Question # 9

The reciprocal of decay constant λ of a radioactive material is:

Question # 10

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 11

The number of isotopes of hydrogen are

Question # 12

The number of protons inside a nucleus is called

Question # 13

Pair production take place when energy ofγ-rays photon is

Question # 14

Binding energy per nucleus is

Question # 15

Marie curie and Pierre curie discovered:

Question # 16

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 17

In radio-active decay, the original element which disintegrate to another element is called

Question # 18

The total charge of any nucleus is given as

Question # 19

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

Question # 20

The range ofβ-particle in air is greater than that ofα-particle by

Question # 21

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

Question # 22

Mass of neutron is

Question # 23

The amount of energy equivalent to 1 a.m.u is

Question # 24

The chemical behaviour of an atom is determined by

Question # 25

How many isotopes of helium are present?

Question # 26

The half life of radioactive substances depends upon

Question # 27

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

Question # 28

For Protium, the mass defect is:

Question # 29

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 30

Nucleon means:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
2 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
3 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
4 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
5 Referring to the above figure, we can say that of all the elements, the most stable element is
A. Phosphours
B. Iron
C. uranium
D. Lithium
6 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
7 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
8 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
9 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
10 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)

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