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 emission of radiations take place in elements, having charge number greater than

Question # 2

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

Question # 3

The figure 1.007276μ shows the mass of an:

Question # 4

The half lie of radium-226 is

Question # 5

Which of the following material has smaller has life

Question # 6

1 amu is equal to

Question # 7

When certain nucleus emits anα particle, its mass number:

Question # 8

U-238 present in the natural uranium is about:

Question # 9

The unit of decay constant is:

Question # 10

Proton was discovered by Rutherford in

Question # 11

In 1932 Chadwick discovered

Question # 12

Structure of the nucleus was explained by

Question # 13

Rate of decay is actually described by.

Question # 14

Neutrons are

Question # 15

The isotope/s of hydrogen is /are:

Question # 16

Phenomenon of radioactivity is due to disintegration of

Question # 17

There is present in paraffin a large amount of:

Question # 18

Which are not the elementary particles?

Question # 19

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

Question # 20

The chemical behaviour of an atom is determined by

Question # 21

Different radioactive material have

Question # 22

Mass of neutron is

Question # 23

Beta particles are

Question # 24

Binding energy per nucleus is

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

γ-rays are

Question # 30

A curie represents a very strong source of

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
2 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
3 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
4 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
5 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
6 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
7 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
8 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
9 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron
10 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only

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