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

Radioactivity was discovered by:

Question # 2

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

Question # 3

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

Question # 4

Nucleus consists of

Question # 5

Mass of neutron is

Question # 6

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 7

There is present in paraffin a large amount of:

Question # 8

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

Proton was discovered by Rutherford in

Question # 13

Neutron was discovered by

Question # 14

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

Question # 15

Marie curie and Pierre curie discovered:

Question # 16

According to Rutherford atomic model, the positive charge in an atom

Question # 17

When certain nucleus emits aβ-particles, is mass number:

Question # 18

The number of isotopes of hydrogen are

Question # 19

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

Question # 20

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

Question # 21

The range of particle depends upon the factor

Question # 22

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

Question # 23

The amount of energy equivalent to 1 a.m.u is

Question # 24

Mass of proton is of order of

Question # 25

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

Question # 26

Structure of the nucleus was explained by

Question # 27

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

Question # 28

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

Question # 29

When certain nucleus emits anα particle, its mass number:

Question # 30

The chemical properties of all the isotopes of an elements are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
2 The distance travelled byα-particle in a medium before coming to rest, is called
A. range ofγ-particle
B. range of neutrons
C. range of particle
D. none of these
3 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
4 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
5 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
6 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
7 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
8 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
9 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
10 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these

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