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

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

Question # 2

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

Question # 3

Marie curie and Pierre curie discovered:

Question # 4

The range of particle depends upon the factor

Question # 5

Structure of the nucleus was explained by

Question # 6

Nucleon means:

Question # 7

In 1932 Chadwick discovered

Question # 8

How many isotopes of helium are present?

Question # 9

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

Question # 10

Neon gas have three isotopes whose atomic numbers are

Question # 11

Nuclei that have the same charge number but different mass number are called

Question # 12

The rate of decay of a radioactive substance

Question # 13

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 14

1 amu is equal to.

Question # 15

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

Question # 16

The number if neutrons in the nucleus of 92U235are

Question # 17

Radiation detector are used to

Question # 18

When a charged particle passes through matter, it produces ionization, this effect is used in

Question # 19

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

Question # 20

When certain nucleus emits anα particle, its mass number:

Question # 21

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

Question # 22

Which are not the elementary particles?

Question # 23

After alpha decay the atomic number of the atom

Question # 24

Radium was discovered by:

Question # 25

γ-rays behave like a particle because they explain the

Question # 26

The chemical properties of an element depends upon the number of

Question # 27

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

Question # 28

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

Question # 29

The figure 1.007276μ shows the mass of an:

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
2 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
3 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
4 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
5 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
6 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%
7 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
8 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
9 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
10 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

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