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

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

Question # 2

The half life of uranium-238 is

Question # 3

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

Question # 4

Nucleus consists of

Question # 5

Radium was discovered by:

Question # 6

The rate of decay of a radioactive substance

Question # 7

Marie curie and Pierre curie discovered:

Question # 8

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

Question # 9

Radioactivity

Question # 10

The range of particle depends upon the factor

Question # 11

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

Question # 12

Which of the following material has longer half life

Question # 13

The chemical properties of all the isotopes of an elements are

Question # 14

Radiation detector are used to

Question # 15

There is present in paraffin a large amount of:

Question # 16

Mass of neutron is

Question # 17

A pair of quark and antiquark makes a:

Question # 18

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

Question # 19

Neutron was suggested to be in the nucleus by:

Question # 20

Neutrons are

Question # 21

Radioactivity was discovered by

Question # 22

Neutron was disvovered by:

Question # 23

Radioactivity is

Question # 24

The penetration power ofβ-particle is

Question # 25

In wilson cloud chamber, the air becomes saturated with:

Question # 26

A particle having the mass of electron and charge of a proton is called a

Question # 27

The number if neutrons in the nucleus of 92U235are

Question # 28

The time required for a radioactive material to decrease in active by one half is called

Question # 29

The half lie of radium-226 is

Question # 30

γ-rays behave like a particle because they explain the

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these
2 Mass of neutron is
A. 1.67 x 10-31kg
B. 1.67 x 10-27kg
C. 9.1 x 10-31kg
D. 1.67 x 10-19kg
3 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
4 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
5 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
6 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
7 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
8 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
9 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four
10 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes

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