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

Mass of proton is of order of

Question # 2

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

Question # 3

The number of isotopes of hydrogen are

Question # 4

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

Question # 5

Mass of proton is

Question # 6

The unit of decay constant is

Question # 7

The total charge of any nucleus is given as

Question # 8

Radiation detector are used to

Question # 9

Neutron was suggested to be in the nucleus by:

Question # 10

Neutron was discovered in

Question # 11

Neon gas have three isotopes whose atomic numbers are

Question # 12

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

Question # 13

Alfa particles are

Question # 14

Neutrons are

Question # 15

Nucleus of a hydrogen atom may contain:

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

1 amu is equal to.

Question # 20

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

Question # 21

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

Question # 22

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

Question # 23

γ-rays are

Question # 24

Radium was discovered by:

Question # 25

Marie curie and Pierre curie discovered:

Question # 26

Proton was discovered by Rutherford in

Question # 27

The penetration power ofβ-particle is

Question # 28

Pair production take place when energy ofγ-rays photon is

Question # 29

Which of the following material has longer half life

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
2 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
3 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
4 Mass of neutron is
A. 1.67 x 10-31kg
B. 1.67 x 10-27kg
C. 9.1 x 10-31kg
D. 1.67 x 10-19kg
5 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
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 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
8 The distance travelled byα-particle in a medium before coming to rest, is called
A. range ofγ-particle
B. range of neutrons
C. range of particle
D. none of these
9 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
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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