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

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

Question # 3

Which are not the elementary particles?

Question # 4

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

Question # 5

Neutrons are

Question # 6

The isotope/s of hydrogen is /are:

Question # 7

The rate of decay of a radioactive substance

Question # 8

Charge on proton is

Question # 9

In 1932 Chadwick discovered

Question # 10

Mass of neutron is

Question # 11

Which of these is not a radiation detector

Question # 12

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 # 13

For Protium, the mass defect is:

Question # 14

Neutron was suggested to be in the nucleus by:

Question # 15

The chemical properties of an element depends upon the number of

Question # 16

The number of isotopes of hydrogen are

Question # 17

Radioactivity was discovered by

Question # 18

Which of the following material has smaller has life

Question # 19

Alfa particles are

Question # 20

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 # 21

An alpha particle has a charge of

Question # 22

The most abundant isotope of neon is

Question # 23

The chemical behaviour of an atom is determined by

Question # 24

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

Question # 25

Nucleon means:

Question # 26

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

Question # 27

The range ofβ-particle in air is greater than that ofα-particle by

Question # 28

The diameter of an atom is of the order

Question # 29

When a nucleus emits an alpha particle, it atomic mass decreased by

Question # 30

There is present in paraffin a large amount of:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time
2 1 amu is equal to
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-34kg
D. 1.66 x 10-27kg
3 When a charged particle passes through matter, it produces ionization, this effect is used in
A. fission reaction
B. reactor
C. radiation detector
D. fusion reaction
4 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
5 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
6 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
7 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%
8 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
9 The energy acquired by a mass of 1g moving with the speed of light is
A. 3 x 108J
B. 9 x 1013J
C. 3 x 1013J
D. 9 x 1016J
10 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

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