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

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Question # 1

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

Question # 2

When certain nucleus emits aβ-particles, is mass number:

Question # 3

The amount of energy equivalent to 1 a.m.u is

Question # 4

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

Question # 5

The reciprocal of decay constant λ of a radioactive material is:

Question # 6

Which of the following material has longer half life

Question # 7

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

Question # 8

The half lie of radium-226 is

Question # 9

Nuclei that have the same charge number but different mass number are called

Question # 10

Radioactivity is

Question # 11

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 # 12

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

Question # 13

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 # 14

The total charge of any nucleus is given as

Question # 15

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

Question # 16

γ-rays are

Question # 17

Marie curie and Pierre curie discovered:

Question # 18

Radioactivity was discovered by

Question # 19

Examples of moderators used in a fission reactor is/are:

Question # 20

For Protium, the mass defect is:

Question # 21

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

Question # 22

The nucleus/nuclei of hydrogen is/are:

Question # 23

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

Question # 24

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

Question # 25

A mass spectrograph sort out

Question # 26

Binding energy per nucleus is

Question # 27

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

Question # 28

Nucleon means:

Question # 29

In 1932 Chadwick discovered

Question # 30

Radioactivity was discovered by:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
2 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
3 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
4 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
5 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
6 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
7 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
8 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years
9 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
10 The counter, which also provides the power to the G.M. tube is called:
A. Thin mica window
B. thin glass window
C. Airy window
D. Wooden window

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