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

Question # 2

The unit of decay constant is

Question # 3

The most abundant isotope of neon is

Question # 4

Which of the following material has longer half life

Question # 5

A curie represents a very strong source of

Question # 6

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

Question # 7

Charge on proton is

Question # 8

A pair of quark and antiquark makes a:

Question # 9

According to Rutherford atomic model, the positive charge in an atom

Question # 10

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

Question # 11

The figure 1.007276μ shows the mass of an:

Question # 12

Three quarks make:

Question # 13

Phenomenon of radioactivity is due to disintegration of

Question # 14

Neutron was disvovered by:

Question # 15

The chemical behaviour of an atom is determined by

Question # 16

The number of isotopes of hydrogen are

Question # 17

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

Question # 18

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

Question # 19

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

Question # 20

The rate of decay of a radioactive substance

Question # 21

An alpha particle has a charge of

Question # 22

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

Question # 23

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

Question # 24

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

Question # 25

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

Question # 26

Marie curie and Pierre curie discovered:

Question # 27

The energy is found from Einstein's mass energy relation is called

Question # 28

γ-rays are

Question # 29

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

Question # 30

The half life of radioactive substances depends upon

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
2 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
3 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
4 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
5 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
6 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian
7 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
8 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
9 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
10 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron

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