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

Pair production take place when energy ofγ-rays photon is

Question # 2

The chemical properties of all the isotopes of an elements are

Question # 3

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

Question # 4

γ-rays are

Question # 5

Binding energy per nucleus is

Question # 6

In wilson cloud chamber, the air becomes saturated with:

Question # 7

For Protium, the mass defect is:

Question # 8

Alfa particles are

Question # 9

A curie represents a very strong source of

Question # 10

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

Question # 11

Phenomenon of radioactivity is due to disintegration of

Question # 12

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

Question # 13

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 14

The chemical properties of an element depends upon the number of

Question # 15

Radioactivity was discovered by

Question # 16

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

Question # 17

How many isotopes of helium are present?

Question # 18

Mass of proton is of order of

Question # 19

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

Question # 20

Electrons are

Question # 21

Neutron was disvovered by:

Question # 22

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

Question # 23

Proton was discovered by Rutherford in

Question # 24

Charge on proton is

Question # 25

The isotope/s of hydrogen is /are:

Question # 26

Radiation detector are used to

Question # 27

The unit of decay constant is:

Question # 28

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 29

The number of protons inside a nucleus is called

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
2 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
3 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
4 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
5 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
6 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
7 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
8 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
9 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
10 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

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