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

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

Question # 2

The chemical behaviour of an atom is determined by

Question # 3

The number of isotopes of hydrogen are

Question # 4

U-238 present in the natural uranium is about:

Question # 5

The isotope/s of hydrogen is /are:

Question # 6

Gamma rays consist of steam of

Question # 7

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

Question # 8

Different radioactive material have

Question # 9

Neutron was discovered in

Question # 10

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 11

Which are not the elementary particles?

Question # 12

Curie is a unit of

Question # 13

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

Question # 14

γ-rays are

Question # 15

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

Question # 16

Neutron was discovered by

Question # 17

The diameter of an atom is of the order

Question # 18

Which of the following material has smaller has life

Question # 19

How many isotopes of helium are present?

Question # 20

Three quarks make:

Question # 21

The number if neutrons in the nucleus of 92U235are

Question # 22

Radioactivity

Question # 23

Mass of proton is of order of

Question # 24

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

Question # 25

The figure 1.007276μ shows the mass of an:

Question # 26

The half lie of radium-226 is

Question # 27

Rate of decay is actually described by.

Question # 28

Marie curie and Pierre curie discovered:

Question # 29

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

Question # 30

For Protium, the mass defect is:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1
2 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
3 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
4 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
5 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
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 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
8 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000
9 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
10 The range ofβ-particle in air is greater than that ofα-particle by
A. 1000 times
B. 100 times
C. 15 times
D. 10 times

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