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

00:00
Question # 1

There is present in paraffin a large amount of:

Question # 2

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

Question # 3

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 4

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

Question # 5

The number of isotopes of hydrogen are

Question # 6

Radioactivity is

Question # 7

How many isotopes of helium are present?

Question # 8

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 9

The number of protons inside a nucleus is called

Question # 10

Which are not the elementary particles?

Question # 11

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

Question # 12

Radioactivity

Question # 13

Which of the following material has longer half life

Question # 14

Neutron was suggested to be in the nucleus by:

Question # 15

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 16

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

Question # 17

Rutherford performed an experiment on nuclear reactions in:

Question # 18

In wilson cloud chamber, the air becomes saturated with:

Question # 19

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

Question # 20

The half life of radioactive substances depends upon

Question # 21

The isotope/s of hydrogen is /are:

Question # 22

Fraction of the decaying atoms per unit time is called

Question # 23

A mass spectrograph sort out

Question # 24

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

Question # 25

The total charge of any nucleus is given as

Question # 26

After alpha decay the atomic number of the atom

Question # 27

1 amu is equal to

Question # 28

The most abundant isotope of neon is

Question # 29

Neon gas have three isotopes whose atomic numbers are

Question # 30

Radioactivity was discovered by:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
3 Referring to the above figure, we can say that of all the elements, the most stable element is
A. Phosphours
B. Iron
C. uranium
D. Lithium
4 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
5 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
6 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is
A. A - Z
B. A + Z
C. Z
D. A
7 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
8 The energy acquired by a mass of 1g moving with the speed of light is
A. 3 x 108J
B. 9 x 1013J
C. 3 x 1013J
D. 9 x 1016J
9 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
10 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)

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