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 time required for a radioactive material to decrease in active by one half is called

Question # 2

Radium was discovered by:

Question # 3

Mass of proton is

Question # 4

An alpha particle has a charge of

Question # 5

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

Question # 6

Three quarks make:

Question # 7

Beta particles are

Question # 8

The figure 1.007276μ shows the mass of an:

Question # 9

For Protium, the mass defect is:

Question # 10

Radioactivity was discovered by:

Question # 11

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

Question # 12

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

Question # 13

Nucleus of a hydrogen atom may contain:

Question # 14

The total charge of any nucleus is given as

Question # 15

Phenomenon of radioactivity is due to disintegration of

Question # 16

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 17

Neutron was discovered by

Question # 18

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

Question # 19

In wilson cloud chamber, the air becomes saturated with:

Question # 20

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

Question # 21

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

Question # 22

A mass spectrograph sort out

Question # 23

The half lie of radium-226 is

Question # 24

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

Question # 25

In 1932 Chadwick discovered

Question # 26

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 27

When certain nucleus emits aβ-particles, is mass number:

Question # 28

After alpha decay the atomic number of the atom

Question # 29

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

Question # 30

The rate of decay of radioactive substance

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 1 amu is equal to.
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-24kg
D. 1.66 x 10-27kg
2 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron
3 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
4 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
5 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
6 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
7 The range ofβ-particle in air is greater than that ofα-particle by
A. 1000 times
B. 100 times
C. 15 times
D. 10 times
8 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
9 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
10 Mass of neutron is
A. 1.67 x 10-31kg
B. 1.67 x 10-27kg
C. 9.1 x 10-31kg
D. 1.67 x 10-19kg

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