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

γ-rays are

Question # 2

Fraction of the decaying atoms per unit time is called

Question # 3

1 amu is equal to.

Question # 4

A pair of quark and antiquark makes a:

Question # 5

β-particles are easily deflected by collisions than heavy

Question # 6

Neutron was suggested to be in the nucleus by:

Question # 7

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

Question # 8

Beta particles are

Question # 9

Which are not the elementary particles?

Question # 10

The total charge of any nucleus is given as

Question # 11

The number of all the protons and neutrons in a nucleus is known as

Question # 12

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

Question # 13

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 14

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

Question # 15

Which of the following material has longer half life

Question # 16

When certain nucleus emits anα particle, its mass number:

Question # 17

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

Question # 18

Gamma rays consist of steam of

Question # 19

The penetration power ofβ-particle is

Question # 20

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

Question # 21

The time required for a radioactive material to decrease in active by one half is called

Question # 22

Radiation detector are used to

Question # 23

Curie is a unit of

Question # 24

Proton was discovered by Rutherford in

Question # 25

Neon gas have three isotopes whose atomic numbers are

Question # 26

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

Question # 27

An alpha particle has a charge of

Question # 28

The diameter of an atom is of the order

Question # 29

Radioactivity was discovered by

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 The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called
A. nuclear fission
B. nuclear fusion
C. man defect
D. radioactivity
2 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
3 Mass of proton is
A. 1.67 x 10-27kg
B. 1.67 x 10-31kg
C. 1.66 x 10-34kg
D. 1.67 x 10-17kg
4 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
5 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
6 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
7 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
8 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
9 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)
10 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium

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