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

00:00
Question # 1

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

Question # 2

Gamma rays consist of steam of

Question # 3

Radium was discovered by:

Question # 4

Mass of proton is

Question # 5

After alpha decay the atomic number of the atom

Question # 6

The half life of radioactive substances depends upon

Question # 7

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 8

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

Question # 9

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

Question # 10

According to Rutherford atomic model, the positive charge in an atom

Question # 11

Fraction of the decaying atoms per unit time is called

Question # 12

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

Question # 13

The rate of decay of a radioactive substance

Question # 14

Neutron was suggested to be in the nucleus by:

Question # 15

Three quarks make:

Question # 16

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

Question # 17

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

Question # 18

Different radioactive material have

Question # 19

Phenomenon of radioactivity is due to disintegration of

Question # 20

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

Question # 21

Rate of decay is actually described by.

Question # 22

The emission of radiations take place in elements, having charge number greater than

Question # 23

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

Question # 24

The range of particle depends upon the factor

Question # 25

Radioactivity was discovered by:

Question # 26

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

Question # 27

Nucleus of a hydrogen atom may contain:

Question # 28

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

Question # 29

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

Question # 30

Radioactivity is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
3 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
4 1 amu is equal to
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-34kg
D. 1.66 x 10-27kg
5 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
6 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
7 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
8 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
9 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
10 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford

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