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

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

Question # 2

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

Question # 3

Which of the following material has smaller has life

Question # 4

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

Question # 5

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

Question # 6

The unit of decay constant is:

Question # 7

The figure 1.007276μ shows the mass of an:

Question # 8

Neutrons are

Question # 9

There is present in paraffin a large amount of:

Question # 10

Which of the following material has longer half life

Question # 11

1 amu is equal to

Question # 12

Mass of neutron is

Question # 13

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 # 14

The number if neutrons in the nucleus of 92U235are

Question # 15

Alfa particles are

Question # 16

The isotope/s of hydrogen is /are:

Question # 17

Radioactivity was discovered by:

Question # 18

For Protium, the mass defect is:

Question # 19

γ-rays behave like a particle because they explain the

Question # 20

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

Question # 21

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

Question # 22

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

Question # 23

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

Question # 24

The penetration power ofβ-particle is

Question # 25

Three quarks make:

Question # 26

In 1932 Chadwick discovered

Question # 27

The diameter of an atom is of the order

Question # 28

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

Question # 29

Structure of the nucleus was explained by

Question # 30

The rate of decay of a radioactive substance

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
2 The range of particle depends upon the factor
A. charge, mass and energy of particle
B. density of medium
C. ionization potential of the atoms
D. all the above
3 In radioactive decay, the new element which is formed due to the disintegration of original element is called
A. element
B. daughter element
C. parent element
D. none of these
4 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
5 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
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 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
8 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C
9 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
10 In radio-active decay, the original element which disintegrate to another element is called
A. element
B. daughter element
C. parent element
D. none of these

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