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

Three quarks make:

Question # 2

The figure 1.007276μ shows the mass of an:

Question # 3

Proton was discovered by Rutherford in

Question # 4

How many isotopes of helium are present?

Question # 5

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

Question # 6

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

Question # 7

Radiation detector are used to

Question # 8

γ-rays are

Question # 9

Neon gas have three isotopes whose atomic numbers are

Question # 10

Which of the following material has smaller has life

Question # 11

The total charge of any nucleus is given as

Question # 12

Binding energy per nucleus is

Question # 13

Neutrons are

Question # 14

Pair production take place when energy ofγ-rays photon is

Question # 15

The reciprocal of decay constant λ of a radioactive material is:

Question # 16

The isotope/s of hydrogen is /are:

Question # 17

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

Question # 18

After alpha decay the atomic number of the atom

Question # 19

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

Question # 20

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

Question # 21

Nucleus of a hydrogen atom may contain:

Question # 22

Alfa particles are

Question # 23

Nucleon means:

Question # 24

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

Question # 25

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

Question # 26

The diameter of an atom is of the order

Question # 27

In 1932 Chadwick discovered

Question # 28

Which are not the elementary particles?

Question # 29

1 amu is equal to.

Question # 30

Mass of neutron is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
2 The energy acquired by a mass of 1g moving with the speed of light is
A. 3 x 108J
B. 9 x 1013J
C. 3 x 1013J
D. 9 x 1016J
3 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
4 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
A. deuteron
B. deterium
C. protium
D. tritium
5 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
6 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years
7 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
8 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four
9 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
10 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus

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