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

When certain nucleus emits anα particle, its mass number:

Question # 2

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 # 3

Gamma rays consist of steam of

Question # 4

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

Question # 5

The total charge of any nucleus is given as

Question # 6

In 1932 Chadwick discovered

Question # 7

Beta particles are

Question # 8

Mass of proton is

Question # 9

Which of the following material has smaller has life

Question # 10

The half life of radioactive substances depends upon

Question # 11

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

Question # 12

The chemical properties of an element depends upon the number of

Question # 13

Nucleus of a hydrogen atom may contain:

Question # 14

Radiation detector are used to

Question # 15

The rate of decay of a radioactive substance

Question # 16

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

Question # 17

γ-rays are

Question # 18

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

Question # 19

A mass spectrograph sort out

Question # 20

Alfa particles are

Question # 21

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

Question # 22

Nucleus consists of

Question # 23

Curie is a unit of

Question # 24

The chemical behaviour of an atom is determined by

Question # 25

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

Question # 26

In wilson cloud chamber, the air becomes saturated with:

Question # 27

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

Question # 28

The rate of decay of radioactive substance

Question # 29

The nucleus/nuclei of hydrogen is/are:

Question # 30

Pair production take place when energy ofγ-rays photon is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
3 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
4 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
5 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
6 Radiation detector are used to
A. measure intensity of radiation
B. measure energy of radiation
C. difference between different types of radiation
D. all the above
7 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
8 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
9 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
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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