ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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

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ECAT Physics Chapter 21 Nuclear Physics

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Question # 1

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

Question # 2

Rutherford performed an experiment on nuclear reactions in:

Question # 3

Radium was discovered by:

Question # 4

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 5

Examples of moderators used in a fission reactor is/are:

Question # 6

When certain nucleus emits anα particle, its mass number:

Question # 7

In 1932 Chadwick discovered

Question # 8

Neutron was discovered in

Question # 9

Three quarks make:

Question # 10

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

Question # 11

The chemical properties of all the isotopes of an elements are

Question # 12

The number of protons inside a nucleus is called

Question # 13

The isotope/s of hydrogen is /are:

Question # 14

Radioactivity is

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
2 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
3 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
4 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
5 Pair production take place when energy ofγ-rays photon is
A. equal to 1.02 Mev-
B. greater than 1.02 Mev
C. less than 1.02 Mev
D. none of these
6 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
7 In radio-active decay, the original element which disintegrate to another element is called
A. element
B. daughter element
C. parent element
D. none of these
8 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
9 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
10 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

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