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

The half life of radioactive substances depends upon

Question # 2

Structure of the nucleus was explained by

Question # 3

For Protium, the mass defect is:

Question # 4

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

Question # 5

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

Question # 6

Which of the following material has longer half life

Question # 7

A pair of quark and antiquark makes a:

Question # 8

The nucleus left after the emission of some radiation is called:

Question # 9

Neutron was disvovered by:

Question # 10

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 11

Neutron was suggested to be in the nucleus by:

Question # 12

Proton was discovered by Rutherford in

Question # 13

Radioactivity was discovered by

Question # 14

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

Question # 15

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

Question # 16

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

Question # 17

Which are not the elementary particles?

Question # 18

The half lie of radium-226 is

Question # 19

Nucleus of a hydrogen atom may contain:

Question # 20

Mass of proton is

Question # 21

When certain nucleus emits anα particle, its mass number:

Question # 22

In wilson cloud chamber, the air becomes saturated with:

Question # 23

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

Question # 24

Alfa particles are

Question # 25

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

Question # 26

How many isotopes of helium are present?

Question # 27

Nucleon means:

Question # 28

The unit of decay constant is

Question # 29

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

Question # 30

Mass of neutron is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
2 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
3 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
4 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%
5 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
6 Neutron was suggested to be in the nucleus by:
A. Rutherford in 1920
B. Bohar in 1913
C. Dirac in 1928
D. Anderson in 1932
7 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
8 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
9 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
10 For an atom having atomic number Z and atomic weight A, the number of electron in an atoms
A. A - Z
B. A + Z
C. Z
D. A

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