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

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

Question # 2

Radiation detector are used to

Question # 3

The unit of decay constant is:

Question # 4

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

Question # 5

In radio-active decay, the original element which disintegrate to another element is called

Question # 6

There is present in paraffin a large amount of:

Question # 7

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

Question # 8

Proton was discovered by Rutherford in

Question # 9

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

Question # 10

The total charge of any nucleus is given as

Question # 11

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 12

The rate of decay of radioactive substance

Question # 13

After alpha decay the atomic number of the atom

Question # 14

Which of the following material has longer half life

Question # 15

β-particles are easily deflected by collisions than heavy

Question # 16

Radium was discovered by:

Question # 17

In wilson cloud chamber, the air becomes saturated with:

Question # 18

Which are not the elementary particles?

Question # 19

The half life of radioactive substances depends upon

Question # 20

The chemical properties of all the isotopes of an elements are

Question # 21

The counter, which also provides the power to the G.M. tube is called:

Question # 22

The most abundant isotope of neon is

Question # 23

Mass of proton is

Question # 24

The range ofβ-particle in air is greater than that ofα-particle by

Question # 25

Neutron was disvovered by:

Question # 26

The number of protons inside a nucleus is called

Question # 27

Nucleus consists of

Question # 28

Radioactivity was discovered by:

Question # 29

The half lie of radium-226 is

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
2 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
3 Mass of proton is
A. 1.67 x 10-27kg
B. 1.67 x 10-31kg
C. 1.66 x 10-34kg
D. 1.67 x 10-17kg
4 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
5 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
6 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
7 Charge on proton is
A. 1.59 x 10-9C
B. 1.59 x 10-7C
C. -1.59 x 10-19 C
D. 1.59 x 10-19C
8 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
9 The number of all the protons and neutrons in a nucleus is known as
A. atomic number
B. mass number
C. charge number
D. none of these
10 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.

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