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

The chemical properties of all the isotopes of an elements are

Question # 3

Charge on neutron is

Question # 4

The nucleus/nuclei of hydrogen is/are:

Question # 5

Electrons are

Question # 6

The chemical behaviour of an atom is determined by

Question # 7

Mass of proton is

Question # 8

The rate of decay of radioactive substance

Question # 9

Neutron was discovered in

Question # 10

Curie is a unit of

Question # 11

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

Question # 12

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

Question # 13

Mass of neutron is

Question # 14

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 15

The diameter of an atom is of the order

Question # 16

Beta particles are

Question # 17

Neutron was disvovered by:

Question # 18

There is present in paraffin a large amount of:

Question # 19

The penetration power ofβ-particle is

Question # 20

A mass spectrograph sort out

Question # 21

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

Question # 22

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

Question # 23

Mass of proton is of order of

Question # 24

Different radioactive material have

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

Radiation detector are used to

Question # 29

A pair of quark and antiquark makes a:

Question # 30

Three quarks make:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
2 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
3 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
4 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
5 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
6 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
7 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
8 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
9 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
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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