ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

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

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Question # 1

Structure of the nucleus was explained by

Question # 2

The figure 1.007276μ shows the mass of an:

Question # 3

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

Question # 4

The number of protons inside a nucleus is called

Question # 5

For Protium, the mass defect is:

Question # 6

The range of particle depends upon the factor

Question # 7

How much time, theα-particle more massive than an electron

Question # 8

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

Question # 9

Neutron was discovered in

Question # 10

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

Question # 11

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 12

The half lie of radium-226 is

Question # 13

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

Question # 14

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

Question # 15

β-particles are easily deflected by collisions than heavy

Question # 16

A mass spectrograph sort out

Question # 17

The diameter of an atom is of the order

Question # 18

Charge on neutron is

Question # 19

Beta particles are

Question # 20

When certain nucleus emits anα particle, its mass number:

Question # 21

Radium was discovered by:

Question # 22

Rate of decay is actually described by.

Question # 23

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

Question # 24

Alfa particles are

Question # 25

Binding energy per nucleus is

Question # 26

Charge on proton is

Question # 27

The chemical properties of an element depends upon the number of

Question # 28

The nucleus/nuclei of hydrogen is/are:

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
2 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
3 According to Rutherford atomic model, the positive charge in an atom
A. is concentrated at its centre
B. is in the form of positive electron at same distance from its centre
C. is spread uniformly through its volume
D. none of these
4 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
5 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
6 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
7 1 amu is equal to
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-34kg
D. 1.66 x 10-27kg
8 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
9 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
10 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity

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