ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

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

U-238 present in the natural uranium is about:

Question # 2

Beta particles are

Question # 3

Structure of the nucleus was explained by

Question # 4

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

Question # 5

Rutherford performed an experiment on nuclear reactions in:

Question # 6

Nucleus of a hydrogen atom may contain:

Question # 7

Radium was discovered by:

Question # 8

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

Question # 9

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

Question # 10

Examples of moderators used in a fission reactor is/are:

Question # 11

How much time, theα-particle more massive than an electron

Question # 12

The nucleus/nuclei of hydrogen is/are:

Question # 13

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

Question # 14

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

Question # 15

The chemical behaviour of an atom is determined by

Question # 16

γ-rays behave like a particle because they explain the

Question # 17

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

Question # 18

When a nucleus emits an alpha particle, it atomic mass decreased by

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

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

Question # 21

The penetration power ofβ-particle is

Question # 22

The chemical properties of an element depends upon the number of

Question # 23

Which of the following material has smaller has life

Question # 24

The half life of radioactive substances depends upon

Question # 25

1 amu is equal to

Question # 26

The total charge of any nucleus is given as

Question # 27

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

Question # 28

Neutrons are

Question # 29

Proton was discovered by Rutherford in

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
2 For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is
A. A - Z
B. A
C. Z
D. A + Z
3 In radioactive decay, the new element which is formed due to the disintegration of original element is called
A. element
B. daughter element
C. parent element
D. none of these
4 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%
5 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
6 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
7 For an atom having atomic number Z and atomic weight A, the number of electron in an atoms
A. A - Z
B. A + Z
C. Z
D. A
8 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
9 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
10 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas

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