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 nuclei of an element having the same charge number but different mass numbers are called:

Question # 2

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

Question # 3

Which of the following material has longer half life

Question # 4

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

Question # 5

Which are not the elementary particles?

Question # 6

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

Question # 7

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

Question # 8

Nucleus of a hydrogen atom may contain:

Question # 9

In wilson cloud chamber, the air becomes saturated with:

Question # 10

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

Question # 11

When a nucleus emits an alpha particles, its charge number decreases by

Question # 12

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

Question # 13

When a charged particle passes through matter, it produces ionization, this effect is used in

Question # 14

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

Question # 15

According to Rutherford atomic model, the positive charge in an atom

Question # 16

1 amu is equal to

Question # 17

The most abundant isotope of neon is

Question # 18

Nucleon means:

Question # 19

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

Question # 20

The unit of decay constant is:

Question # 21

The number if neutrons in the nucleus of 92U235are

Question # 22

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

Question # 23

Three quarks make:

Question # 24

Neutron was discovered in

Question # 25

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

Question # 26

Neutrons are

Question # 27

Heavy water is made of one oxygen atom and two atoms of:

Question # 28

The half life of radioactive substances depends upon

Question # 29

The counter, which also provides the power to the G.M. tube is called:

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
2 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
3 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is
A. A - Z
B. A + Z
C. Z
D. A
4 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
5 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
6 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
7 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
8 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
9 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
10 The range of particle depends upon the factor
A. charge, mass and energy of particle
B. density of medium
C. ionization potential of the atoms
D. all the above

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