ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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Question # 1

Neutron was discovered in

Question # 2

Neutron was disvovered by:

Question # 3

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

Question # 4

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

Question # 5

The chemical properties of an element depends upon the number of

Question # 6

Gamma rays consist of steam of

Question # 7

The unit of decay constant is

Question # 8

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

Question # 9

The half life of radioactive substances depends upon

Question # 10

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

Question # 11

The chemical properties of all the isotopes of an elements are

Question # 12

For Protium, the mass defect is:

Question # 13

The chemical behaviour of an atom is determined by

Question # 14

How many isotopes of helium are present?

Question # 15

Mass of neutron is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
2 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
3 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
4 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
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 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
7 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
8 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
9 The time required for a radioactive material to decrease in active by one half is called
A. half time
B. half life
C. disintegration time
D. mean life
10 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m

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