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 isotope/s of hydrogen is /are:

Question # 2

The half life of radioactive substances depends upon

Question # 3

Radioactivity was discovered by:

Question # 4

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

Question # 5

The rate of decay of a radioactive substance

Question # 6

When certain nucleus emits anα particle, its mass number:

Question # 7

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

Question # 8

Beta particles are

Question # 9

1 amu is equal to

Question # 10

There is present in paraffin a large amount of:

Question # 11

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

Question # 12

Electrons are

Question # 13

Charge on neutron is

Question # 14

Mass of neutron is

Question # 15

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

Question # 16

The unit of decay constant is

Question # 17

Three quarks make:

Question # 18

The range of particle depends upon the factor

Question # 19

Which are not the elementary particles?

Question # 20

Rate of decay is actually described by.

Question # 21

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 22

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

Question # 23

Rutherford performed an experiment on nuclear reactions in:

Question # 24

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

Question # 25

Neutron was disvovered by:

Question # 26

Radium was discovered by:

Question # 27

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

Question # 28

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

Question # 29

The diameter of an atom is of the order

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
2 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
3 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
4 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
5 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
6 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
7 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
8 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
9 Radioactivity
A. is exhibited more by semiconductors in general
B. in exhibited more by the element when they are coupled
C. with other radioactive elements by a covalent bond
D. is an atomic property of radioactive elements
10 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule

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