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

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

Question # 2

Neutron was discovered by

Question # 3

Beta particles are

Question # 4

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

Question # 5

Proton was discovered by Rutherford in

Question # 6

Curie is a unit of

Question # 7

Nucleus of a hydrogen atom may contain:

Question # 8

1 amu is equal to

Question # 9

The isotope/s of hydrogen is /are:

Question # 10

Neutron was suggested to be in the nucleus by:

Question # 11

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

Question # 12

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

Question # 13

The half life of radioactive substances depends upon

Question # 14

Alfa particles are

Question # 15

The chemical properties of all the isotopes of an elements are

Question # 16

Three quarks make:

Question # 17

Neutron was disvovered by:

Question # 18

The figure 1.007276μ shows the mass of an:

Question # 19

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

Question # 20

After alpha decay the atomic number of the atom

Question # 21

Neutrons are

Question # 22

A pair of quark and antiquark makes a:

Question # 23

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

Question # 24

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

Question # 25

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

Question # 26

The half life of uranium-238 is

Question # 27

In wilson cloud chamber, the air becomes saturated with:

Question # 28

The total charge of any nucleus is given as

Question # 29

When a nucleus emits an alpha particle, it atomic mass decreased by

Question # 30

The most abundant isotope of neon is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
2 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
3 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
4 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
5 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
6 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
7 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric
8 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
9 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
10 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

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