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

The nucleus/nuclei of hydrogen is/are:

Question # 2

Mass of neutron is

Question # 3

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

Question # 4

Radiation detector are used to

Question # 5

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

Question # 6

Which of the following material has longer half life

Question # 7

Curie is a unit of

Question # 8

A curie represents a very strong source of

Question # 9

Charge on proton is

Question # 10

There is present in paraffin a large amount of:

Question # 11

The most abundant isotope of neon is

Question # 12

Radium was discovered by:

Question # 13

Rate of decay is actually described by.

Question # 14

The chemical behaviour of an atom is determined by

Question # 15

The rate of decay of a radioactive substance

Question # 16

Alfa particles are

Question # 17

Three quarks make:

Question # 18

Gamma rays consist of steam of

Question # 19

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 20

Beta particles are

Question # 21

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

Question # 22

Proton was discovered by Rutherford in

Question # 23

Which of these is not a radiation detector

Question # 24

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

Question # 25

Radioactivity was discovered by

Question # 26

The half life of radioactive substances depends upon

Question # 27

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

Question # 28

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

Question # 29

A pair of quark and antiquark makes a:

Question # 30

The unit of decay constant is:

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ECAT Class Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
2 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
A. deuteron
B. deterium
C. protium
D. tritium
3 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
4 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
5 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron
6 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
7 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
8 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%
9 Referring to the above figure, we can say that of all the elements, the most stable element is
A. Phosphours
B. Iron
C. uranium
D. Lithium
10 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus

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