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

U-238 present in the natural uranium is about:

Question # 2

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

Question # 3

The half life of uranium-238 is

Question # 4

The energy is found from Einstein's mass energy relation is called

Question # 5

The rate of decay of a radioactive substance

Question # 6

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

Question # 7

The half lie of radium-226 is

Question # 8

The penetration power ofβ-particle is

Question # 9

Beta particles are

Question # 10

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

Question # 11

Radioactivity is

Question # 12

Rate of decay is actually described by.

Question # 13

Gamma rays consist of steam of

Question # 14

There is present in paraffin a large amount of:

Question # 15

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

Question # 16

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

Question # 17

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 18

An alpha particle has a charge of

Question # 19

1 amu is equal to

Question # 20

Radioactivity was discovered by:

Question # 21

The chemical properties of an element depends upon the number of

Question # 22

The diameter of an atom is of the order

Question # 23

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 24

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

Question # 25

Neutron was discovered by

Question # 26

A pair of quark and antiquark makes a:

Question # 27

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

Question # 28

Marie curie and Pierre curie discovered:

Question # 29

Mass of neutron is

Question # 30

Radioactivity

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
3 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian
4 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
5 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
6 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
7 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
8 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
9 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these
10 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4

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