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 rate of decay of a radioactive substance

Question # 3

The range of particle depends upon the factor

Question # 4

Structure of the nucleus was explained by

Question # 5

The chemical properties of an element depends upon the number of

Question # 6

The diameter of an atom is of the order

Question # 7

The penetration power ofβ-particle is

Question # 8

Which of the following material has smaller has life

Question # 9

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

Question # 10

Radioactivity was discovered by:

Question # 11

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

Question # 12

1 amu is equal to

Question # 13

When a nucleus emits an alpha particles, its charge number decreases by

Question # 14

The isotope/s of hydrogen is /are:

Question # 15

There is present in paraffin a large amount of:

Question # 16

Radiation detector are used to

Question # 17

Curie is a unit of

Question # 18

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

Question # 19

Neutron was suggested to be in the nucleus by:

Question # 20

The half life of radioactive substances depends upon

Question # 21

Marie curie and Pierre curie discovered:

Question # 22

A curie represents a very strong source of

Question # 23

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

Question # 24

The most abundant isotope of neon is

Question # 25

After alpha decay the atomic number of the atom

Question # 26

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 # 27

The nucleus/nuclei of hydrogen is/are:

Question # 28

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

Question # 29

Radium was discovered by:

Question # 30

Fraction of the decaying atoms per unit time is called

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
3 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
4 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
5 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
6 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
7 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
8 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
9 The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called
A. nuclear fission
B. nuclear fusion
C. man defect
D. radioactivity
10 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon

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