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

Fraction of the decaying atoms per unit time is called

Question # 2

Structure of the nucleus was explained by

Question # 3

Radioactivity

Question # 4

The chemical properties of an element depends upon the number of

Question # 5

The amount of energy equivalent to 1 a.m.u is

Question # 6

The unit of decay constant is:

Question # 7

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

Question # 8

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

Question # 9

The figure 1.007276μ shows the mass of an:

Question # 10

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

Question # 11

The energy acquired by a mass of 1g moving with the speed of light is

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

Which of the following material has smaller has life

Question # 14

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

Question # 15

Curie is a unit of

Question # 16

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

Question # 17

Radioactivity was discovered by

Question # 18

The chemical behaviour of an atom is determined by

Question # 19

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

Question # 20

The number of isotopes of hydrogen are

Question # 21

The unit of decay constant is

Question # 22

Binding energy per nucleus is

Question # 23

The total charge of any nucleus is given as

Question # 24

Radiation detector are used to

Question # 25

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

Question # 26

γ-rays behave like a particle because they explain the

Question # 27

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

Question # 28

Nucleon means:

Question # 29

There is present in paraffin a large amount of:

Question # 30

When a charged particle passes through matter, it produces ionization, this effect is used in

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
2 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is
A. A - Z
B. A + Z
C. Z
D. A
3 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
4 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
5 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
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 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
8 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
9 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
10 The amount of energy equivalent to 1 a.m.u is
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev

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