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

Neutrons are

Question # 2

In wilson cloud chamber, the air becomes saturated with:

Question # 3

Rate of decay is actually described by.

Question # 4

The most abundant isotope of neon is

Question # 5

Phenomenon of radioactivity is due to disintegration of

Question # 6

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

Question # 7

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

Question # 8

A mass spectrograph sort out

Question # 9

Neutron was discovered in

Question # 10

The number of isotopes of hydrogen are

Question # 11

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

Question # 12

The rate of decay of a radioactive substance

Question # 13

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

Question # 14

The emission of radiations take place in elements, having charge number greater than

Question # 15

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

Question # 16

The diameter of an atom is of the order

Question # 17

In 1932 Chadwick discovered

Question # 18

The figure 1.007276μ shows the mass of an:

Question # 19

Neon gas have three isotopes whose atomic numbers are

Question # 20

The unit of decay constant is:

Question # 21

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

Question # 22

The total charge of any nucleus is given as

Question # 23

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

Question # 24

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

Question # 25

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

Question # 26

Neutron was discovered by

Question # 27

The chemical properties of all the isotopes of an elements are

Question # 28

A curie represents a very strong source of

Question # 29

How many isotopes of helium are present?

Question # 30

Nucleus of a hydrogen atom may contain:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
2 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
3 Radiation detector are used to
A. measure intensity of radiation
B. measure energy of radiation
C. difference between different types of radiation
D. all the above
4 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
5 Maric Curie and Pieree Curie discovered two new radioactive elements, which are called
A. polonium uranium
B. uranium and radium
C. polonium and radium
D. none of these
6 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
7 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
8 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
9 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
10 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford

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