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

Neutron was discovered in

Question # 2

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

Question # 3

γ-rays behave like a particle because they explain the

Question # 4

Nucleon means:

Question # 5

The chemical behaviour of an atom is determined by

Question # 6

Nucleus of a hydrogen atom may contain:

Question # 7

The most abundant isotope of neon is

Question # 8

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

Question # 9

Radioactivity was discovered by

Question # 10

Beta particles are

Question # 11

There is present in paraffin a large amount of:

Question # 12

The chemical properties of all the isotopes of an elements are

Question # 13

An alpha particle has a charge of

Question # 14

Neon gas have three isotopes whose atomic numbers are

Question # 15

Nucleus consists of

Question # 16

The number of protons inside a nucleus is called

Question # 17

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

Question # 18

Electrons are

Question # 19

β-particles are easily deflected by collisions than heavy

Question # 20

The penetration power ofβ-particle is

Question # 21

How many isotopes of helium are present?

Question # 22

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

Question # 23

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

Question # 24

The isotope/s of hydrogen is /are:

Question # 25

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

Question # 26

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

Question # 27

Structure of the nucleus was explained by

Question # 28

The half life of radioactive substances depends upon

Question # 29

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

Question # 30

The number if neutrons in the nucleus of 92U235are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
2 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
3 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
4 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
5 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
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 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
8 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
9 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
10 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%

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