ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

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

Which are not the elementary particles?

Question # 2

Rutherford performed an experiment on nuclear reactions in:

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

Radioactivity is

Question # 7

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 8

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 9

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

Question # 10

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

Question # 11

The chemical properties of an element depends upon the number of

Question # 12

How much time, theα-particle more massive than an electron

Question # 13

The nucleus/nuclei of hydrogen is/are:

Question # 14

The penetration power ofβ-particle is

Question # 15

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

Question # 16

Structure of the nucleus was explained by

Question # 17

The isotope/s of hydrogen is /are:

Question # 18

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 19

Which of these is not a radiation detector

Question # 20

Mass of neutron is

Question # 21

Radioactivity was discovered by

Question # 22

The half life of radioactive substances depends upon

Question # 23

A pair of quark and antiquark makes a:

Question # 24

Alfa particles are

Question # 25

The diameter of an atom is of the order

Question # 26

The total charge of any nucleus is given as

Question # 27

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 # 28

Three quarks make:

Question # 29

Different radioactive material have

Question # 30

The number of protons inside a nucleus is called

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
2 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
3 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
4 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
5 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
A. deuterium
B. protium
C. tritium
D. none of these
6 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric
7 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
8 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
9 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
10 For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is
A. A - Z
B. A
C. Z
D. A + Z

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