ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

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

Neutron was suggested to be in the nucleus by:

Question # 2

The nucleus/nuclei of hydrogen is/are:

Question # 3

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

Question # 4

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

Question # 5

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 6

γ-rays are

Question # 7

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

Question # 8

Neutron was disvovered by:

Question # 9

An alpha particle has a charge of

Question # 10

The chemical properties of an element depends upon the number of

Question # 11

Beta particles are

Question # 12

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

Question # 13

γ-rays behave like a particle because they explain the

Question # 14

After alpha decay the atomic number of the atom

Question # 15

Alfa particles are

Question # 16

The number of isotopes of hydrogen are

Question # 17

Mass of proton is of order of

Question # 18

Structure of the nucleus was explained by

Question # 19

The total charge of any nucleus is given as

Question # 20

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

Question # 21

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

Question # 22

The number of all the protons and neutrons in a nucleus is known as

Question # 23

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

Question # 24

For Protium, the mass defect is:

Question # 25

A mass spectrograph sort out

Question # 26

The energy acquired by a mass of 1g moving with the speed of light is

Question # 27

Radioactivity

Question # 28

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

Question # 29

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

Question # 30

Binding energy per nucleus is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian
2 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
3 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
4 The number of all the protons and neutrons in a nucleus is known as
A. atomic number
B. mass number
C. charge number
D. none of these
5 Mass of neutron is
A. 1.67 x 10-31kg
B. 1.67 x 10-27kg
C. 9.1 x 10-31kg
D. 1.67 x 10-19kg
6 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1
7 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
8 Referring to the above figure, we can say that of all the elements, the most stable element is
A. Phosphours
B. Iron
C. uranium
D. Lithium
9 Radioactivity
A. is exhibited more by semiconductors in general
B. in exhibited more by the element when they are coupled
C. with other radioactive elements by a covalent bond
D. is an atomic property of radioactive elements
10 Charge on proton is
A. 1.59 x 10-9C
B. 1.59 x 10-7C
C. -1.59 x 10-19 C
D. 1.59 x 10-19C

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