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

Which of the following material has smaller has life

Question # 2

Phenomenon of radioactivity is due to disintegration of

Question # 3

β-particles are easily deflected by collisions than heavy

Question # 4

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

Question # 5

When certain nucleus emits anα particle, its mass number:

Question # 6

The rate of decay of a radioactive substance

Question # 7

γ-rays behave like a particle because they explain the

Question # 8

Charge on neutron is

Question # 9

The chemical behaviour of an atom is determined by

Question # 10

Which of the following material has longer half life

Question # 11

Alfa particles are

Question # 12

The half lie of radium-226 is

Question # 13

When a nucleus emits an alpha particle, it atomic mass decreased by

Question # 14

The figure 1.007276μ shows the mass of an:

Question # 15

Marie curie and Pierre curie discovered:

Question # 16

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

Question # 17

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

Question # 18

Rate of decay is actually described by.

Question # 19

The amount of energy equivalent to 1 a.m.u is

Question # 20

Radiation detector are used to

Question # 21

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

Question # 22

The total charge of any nucleus is given as

Question # 23

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

Question # 24

Proton was discovered by Rutherford in

Question # 25

The rate of decay of radioactive substance

Question # 26

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

Question # 27

How much time, theα-particle more massive than an electron

Question # 28

In wilson cloud chamber, the air becomes saturated with:

Question # 29

Nucleus of a hydrogen atom may contain:

Question # 30

The unit of decay constant is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
2 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
3 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
4 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
5 If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Infinity
6 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
7 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
8 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
A. nuclear fission
B. nuclear fusion
C. man defect
D. radioactivity
9 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
10 In radioactive decay, the new element which is formed due to the disintegration of original element is called
A. element
B. daughter element
C. parent element
D. none of these

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