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

A curie represents a very strong source of

Question # 2

An alpha particle has a charge of

Question # 3

Radioactivity was discovered by

Question # 4

Gamma rays consist of steam of

Question # 5

Charge on proton is

Question # 6

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

Question # 7

Neutron was discovered by

Question # 8

Nucleon means:

Question # 9

Marie curie and Pierre curie discovered:

Question # 10

The chemical behaviour of an atom is determined by

Question # 11

Neutrons are

Question # 12

Beta particles are

Question # 13

The chemical properties of all the isotopes of an elements are

Question # 14

The unit of decay constant is

Question # 15

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

Question # 16

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 17

For Protium, the mass defect is:

Question # 18

There is present in paraffin a large amount of:

Question # 19

Fraction of the decaying atoms per unit time is called

Question # 20

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 21

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

Question # 22

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

Question # 23

The number of protons inside a nucleus is called

Question # 24

Neon gas have three isotopes whose atomic numbers are

Question # 25

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

Question # 26

How many isotopes of helium are present?

Question # 27

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 28

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

Question # 29

Different radioactive material have

Question # 30

When certain nucleus emits anα particle, its mass number:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
2 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
3 For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is
A. A - Z
B. A
C. Z
D. A + Z
4 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
5 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these
6 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus
7 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
8 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)
9 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
A. deuteron
B. deterium
C. protium
D. tritium
10 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these

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