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

Heavy water is made of one oxygen atom and two atoms of:

Question # 2

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

Question # 3

The number of isotopes of hydrogen are

Question # 4

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

Question # 5

The unit of decay constant is

Question # 6

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

Question # 7

Mass of proton is

Question # 8

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 # 9

Nucleus of a hydrogen atom may contain:

Question # 10

Radioactivity was discovered by

Question # 11

The number if neutrons in the nucleus of 92U235are

Question # 12

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

Question # 13

The rate of decay of a radioactive substance

Question # 14

Radioactivity is

Question # 15

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

Question # 16

Nucleon means:

Question # 17

When certain nucleus emits aβ-particles, is mass number:

Question # 18

Neutron was disvovered by:

Question # 19

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 20

Electrons are

Question # 21

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

Question # 22

When certain nucleus emits anα particle, its mass number:

Question # 23

β-particles are easily deflected by collisions than heavy

Question # 24

The chemical behaviour of an atom is determined by

Question # 25

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

Question # 26

Mass of neutron is

Question # 27

Marie curie and Pierre curie discovered:

Question # 28

Binding energy per nucleus is

Question # 29

The half life of uranium-238 is

Question # 30

Different radioactive material have

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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 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
3 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
4 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
5 Which of the following material has longer half life
A. radium
B. polonium
C. radium
D. uranium
6 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
7 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
8 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
9 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
10 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks

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