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

The chemical properties of an element depends upon the number of

Question # 2

1 amu is equal to.

Question # 3

For Protium, the mass defect is:

Question # 4

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

Question # 5

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 6

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

Question # 7

The rate of decay of a radioactive substance

Question # 8

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

Question # 9

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

Question # 10

The range of particle depends upon the factor

Question # 11

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

Question # 12

Charge on neutron is

Question # 13

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

Question # 14

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 15

The chemical behaviour of an atom is determined by

Question # 16

Which are not the elementary particles?

Question # 17

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

Question # 18

Structure of the nucleus was explained by

Question # 19

Radioactivity was discovered by

Question # 20

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

Question # 21

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

Question # 22

Which of the following material has smaller has life

Question # 23

Radioactivity is

Question # 24

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

Question # 25

Nucleus of a hydrogen atom may contain:

Question # 26

The number of protons inside a nucleus is called

Question # 27

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

Question # 28

Mass of proton is of order of

Question # 29

Nucleus consists of

Question # 30

Mass of proton is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The amount of energy equivalent to 1 a.m.u is
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev
2 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
3 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four
4 The time required for a radioactive material to decrease in active by one half is called
A. half time
B. half life
C. disintegration time
D. mean life
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 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
7 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
8 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
9 The range ofβ-particle in air is greater than that ofα-particle by
A. 1000 times
B. 100 times
C. 15 times
D. 10 times
10 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these

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