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

Which of the following material has longer half life

Question # 2

Marie curie and Pierre curie discovered:

Question # 3

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

Question # 4

The chemical behaviour of an atom is determined by

Question # 5

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

Question # 6

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

Question # 7

The most abundant isotope of neon is

Question # 8

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

Question # 9

An alpha particle has a charge of

Question # 10

Three quarks make:

Question # 11

Neutron was discovered in

Question # 12

There is present in paraffin a large amount of:

Question # 13

Radioactivity is

Question # 14

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 15

Radioactivity

Question # 16

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

Question # 17

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

Question # 18

The half life of uranium-238 is

Question # 19

The reciprocal of decay constant λ of a radioactive material is:

Question # 20

Neutron was discovered by

Question # 21

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 22

Neutron was suggested to be in the nucleus by:

Question # 23

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

Question # 24

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

Question # 25

The unit of decay constant is

Question # 26

The diameter of an atom is of the order

Question # 27

Beta particles are

Question # 28

γ-rays are

Question # 29

Neutron was disvovered by:

Question # 30

Mass of neutron is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
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 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
4 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
5 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
6 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years
7 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
8 For an atom having atomic number Z and atomic weight A, the number of electron in an atoms
A. A - Z
B. A + Z
C. Z
D. A
9 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron
10 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920

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