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

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Question # 1

Rate of decay is actually described by.

Question # 2

The figure 1.007276μ shows the mass of an:

Question # 3

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

Question # 4

A mass spectrograph sort out

Question # 5

The unit of decay constant is

Question # 6

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

Question # 7

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

Question # 8

Neutrons are

Question # 9

The total charge of any nucleus is given as

Question # 10

In 1932 Chadwick discovered

Question # 11

Mass of neutron is

Question # 12

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 13

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

Question # 14

1 amu is equal to.

Question # 15

The penetration power ofβ-particle is

Question # 16

For Protium, the mass defect is:

Question # 17

Binding energy per nucleus is

Question # 18

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

Question # 19

Curie is a unit of

Question # 20

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

Question # 21

Different radioactive material have

Question # 22

The number of protons inside a nucleus is called

Question # 23

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

Question # 24

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

Question # 25

The emission of radiations take place in elements, having charge number greater than

Question # 26

Radium was discovered by:

Question # 27

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

Question # 28

Alfa particles are

Question # 29

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

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 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
2 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
3 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
4 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
5 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
6 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
7 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
8 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
9 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
10 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron

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