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

Question # 2

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

Question # 3

Nucleus of a hydrogen atom may contain:

Question # 4

Structure of the nucleus was explained by

Question # 5

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

Question # 6

Radioactivity

Question # 7

Neutrons are

Question # 8

Rutherford performed an experiment on nuclear reactions in:

Question # 9

Rate of decay is actually described by.

Question # 10

The total charge of any nucleus is given as

Question # 11

Which of these is not a radiation detector

Question # 12

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 13

The number of protons inside a nucleus is called

Question # 14

The unit of decay constant is

Question # 15

Phenomenon of radioactivity is due to disintegration of

Question # 16

The half life of uranium-238 is

Question # 17

After alpha decay the atomic number of the atom

Question # 18

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 19

The chemical properties of an element depends upon the number of

Question # 20

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 21

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

Question # 22

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

Question # 23

Mass of neutron is

Question # 24

Binding energy per nucleus is

Question # 25

Which are not the elementary particles?

Question # 26

For Protium, the mass defect is:

Question # 27

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

Question # 28

Curie is a unit of

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 1 amu is equal to.
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-24kg
D. 1.66 x 10-27kg
4 Neutron was suggested to be in the nucleus by:
A. Rutherford in 1920
B. Bohar in 1913
C. Dirac in 1928
D. Anderson in 1932
5 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
6 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
A. deuterium
B. protium
C. tritium
D. none of these
7 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
8 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
9 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
10 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these

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