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

Neutron was discovered in

Question # 2

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

Question # 3

Which of the following material has longer half life

Question # 4

The rate of decay of a radioactive substance

Question # 5

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

Question # 6

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

Question # 7

The chemical properties of an element depends upon the number of

Question # 8

Alfa particles are

Question # 9

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

Question # 10

Which of the following material has smaller has life

Question # 11

Neon gas have three isotopes whose atomic numbers are

Question # 12

Nucleon means:

Question # 13

In wilson cloud chamber, the air becomes saturated with:

Question # 14

1 amu is equal to

Question # 15

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 # 16

Rate of decay is actually described by.

Question # 17

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

Question # 18

Neutron was discovered by

Question # 19

The unit of decay constant is:

Question # 20

Neutrons are

Question # 21

Radioactivity

Question # 22

Gamma rays consist of steam of

Question # 23

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

Question # 24

The penetration power ofβ-particle is

Question # 25

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

Question # 26

The range of particle depends upon the factor

Question # 27

Radioactivity was discovered by

Question # 28

Phenomenon of radioactivity is due to disintegration of

Question # 29

The half lie of radium-226 is

Question # 30

Mass of proton is of order of

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
2 The distance travelled byα-particle in a medium before coming to rest, is called
A. range ofγ-particle
B. range of neutrons
C. range of particle
D. none of these
3 The number of all the protons and neutrons in a nucleus is known as
A. atomic number
B. mass number
C. charge number
D. none of these
4 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
5 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
6 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
7 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is
A. A - Z
B. A + Z
C. Z
D. A
8 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
9 Charge on proton is
A. 1.59 x 10-9C
B. 1.59 x 10-7C
C. -1.59 x 10-19 C
D. 1.59 x 10-19C
10 Maric Curie and Pieree Curie discovered two new radioactive elements, which are called
A. polonium uranium
B. uranium and radium
C. polonium and radium
D. none of these

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