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

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Question # 1

The nucleus/nuclei of hydrogen is/are:

Question # 2

Neutron was discovered by

Question # 3

The range ofβ-particle in air is greater than that ofα-particle by

Question # 4

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

Question # 5

The most abundant isotope of neon is

Question # 6

The chemical properties of all the isotopes of an elements are

Question # 7

Electrons are

Question # 8

There is present in paraffin a large amount of:

Question # 9

A mass spectrograph sort out

Question # 10

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

Question # 11

When a charged particle passes through matter, it produces ionization, this effect is used in

Question # 12

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

Question # 13

The figure 1.007276μ shows the mass of an:

Question # 14

Neon gas have three isotopes whose atomic numbers are

Question # 15

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

Question # 16

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

Question # 17

Nucleus consists of

Question # 18

Neutron was discovered in

Question # 19

When a nucleus emits an alpha particles, its charge number decreases by

Question # 20

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

Question # 21

Charge on proton is

Question # 22

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

Question # 23

The rate of decay of radioactive substance

Question # 24

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

Question # 25

Phenomenon of radioactivity is due to disintegration of

Question # 26

Pair production take place when energy ofγ-rays photon is

Question # 27

The range of particle depends upon the factor

Question # 28

The rate of decay of a radioactive substance

Question # 29

Charge on neutron is

Question # 30

The isotope/s of hydrogen is /are:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
2 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
3 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
4 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
5 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
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 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
8 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
9 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
10 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick

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