ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

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 by

Question # 2

Charge on neutron is

Question # 3

The nucleus/nuclei of hydrogen is/are:

Question # 4

Phenomenon of radioactivity is due to disintegration of

Question # 5

In radioactive decay, the new element which is formed due to the disintegration of original element 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

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

Question # 8

Neutron was suggested to be in the nucleus by:

Question # 9

The range ofβ-particle in air is greater than that ofα-particle by

Question # 10

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

Question # 11

Radioactivity was discovered by:

Question # 12

After alpha decay the atomic number of the atom

Question # 13

Neon gas have three isotopes whose atomic numbers are

Question # 14

In wilson cloud chamber, the air becomes saturated with:

Question # 15

Heavy water is made of one oxygen atom and two atoms of:

Question # 16

1 amu is equal to

Question # 17

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

Question # 18

The chemical properties of all the isotopes of an elements are

Question # 19

β-particles are easily deflected by collisions than heavy

Question # 20

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

Question # 21

When a charged particle passes through matter, it produces ionization, this effect is used in

Question # 22

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

Question # 23

The unit of decay constant is

Question # 24

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

Question # 25

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

Question # 26

Which are not the elementary particles?

Question # 27

Nucleus of a hydrogen atom may contain:

Question # 28

When certain nucleus emits anα particle, its mass number:

Question # 29

A mass spectrograph sort out

Question # 30

γ-rays are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
2 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
3 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
4 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
5 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
6 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
7 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
8 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV
9 Alfa , beta and gamma rays are emitted from a radio-active substance
A. spontaneously
B. when it is heated
C. when it is exposed to light
D. When it interacts with the other particle
10 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle

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