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

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

Question # 2

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 # 3

Mass of proton is

Question # 4

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

Question # 5

Pair production take place when energy ofγ-rays photon is

Question # 6

Neutron was suggested to be in the nucleus by:

Question # 7

The half life of uranium-238 is

Question # 8

The counter, which also provides the power to the G.M. tube is called:

Question # 9

Which of the following material has longer half life

Question # 10

The chemical properties of all the isotopes of an elements are

Question # 11

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 12

The chemical behaviour of an atom is determined by

Question # 13

Three quarks make:

Question # 14

How many isotopes of helium are present?

Question # 15

Proton was discovered by Rutherford in

Question # 16

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 17

In 1932 Chadwick discovered

Question # 18

After alpha decay the atomic number of the atom

Question # 19

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

Question # 20

The half lie of radium-226 is

Question # 21

Nucleus of a hydrogen atom may contain:

Question # 22

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 23

Curie is a unit of

Question # 24

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 25

Neutrons are

Question # 26

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

Question # 27

γ-rays behave like a particle because they explain the

Question # 28

The diameter of an atom is of the order

Question # 29

Mass of proton is of order of

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
2 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron
3 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
4 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
5 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus
6 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years
7 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
8 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
9 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
10 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four

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