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

For Protium, the mass defect is:

Question # 2

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

Question # 3

The penetration power ofβ-particle is

Question # 4

Marie curie and Pierre curie discovered:

Question # 5

The rate of decay of radioactive substance

Question # 6

Mass of neutron is

Question # 7

U-238 present in the natural uranium is about:

Question # 8

Neutron was disvovered by:

Question # 9

Curie is a unit of

Question # 10

The chemical behaviour of an atom is determined by

Question # 11

Which of these is not a radiation detector

Question # 12

Nucleus consists of

Question # 13

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 14

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

Question # 15

γ-rays behave like a particle because they explain the

Question # 16

The rate of decay of a radioactive substance

Question # 17

Electrons are

Question # 18

The number if neutrons in the nucleus of 92U235are

Question # 19

A mass spectrograph sort out

Question # 20

Neon gas have three isotopes whose atomic numbers are

Question # 21

Three quarks make:

Question # 22

The unit of decay constant is:

Question # 23

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 # 24

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

Question # 25

Different radioactive material have

Question # 26

1 amu is equal to

Question # 27

A pair of quark and antiquark makes a:

Question # 28

Structure of the nucleus was explained by

Question # 29

The total charge of any nucleus is given as

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
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 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
4 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
5 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
6 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
7 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
8 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these
9 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)
10 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

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