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

Different radioactive material have

Question # 2

When certain nucleus emits anα particle, its mass number:

Question # 3

The number of isotopes of hydrogen are

Question # 4

γ-rays are

Question # 5

1 amu is equal to

Question # 6

An alpha particle has a charge of

Question # 7

Radioactivity was discovered by

Question # 8

Which of the following material has smaller has life

Question # 9

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

Question # 10

In wilson cloud chamber, the air becomes saturated with:

Question # 11

Mass of neutron is

Question # 12

The half life of uranium-238 is

Question # 13

Charge on proton is

Question # 14

The number of all the protons and neutrons in a nucleus is known as

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

Neutron was suggested to be in the nucleus by:

Question # 19

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

Question # 20

The figure 1.007276μ shows the mass of an:

Question # 21

Curie is a unit of

Question # 22

Charge on neutron is

Question # 23

Neutron was disvovered by:

Question # 24

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

Question # 25

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

Question # 26

Alfa particles are

Question # 27

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

Question # 28

Neutron was discovered in

Question # 29

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

Question # 30

Electrons are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 In radio-active decay, the original element which disintegrate to another element is called
A. element
B. daughter element
C. parent element
D. none of these
3 Alfa , beta and gamma rays are emitted from a radio-active substance
A. spontaneously
B. when it is heated
C. when it is exposed to light
D. When it interacts with the other particle
4 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
5 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
6 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
7 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
8 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
9 In radioactive decay, the new element which is formed due to the disintegration of original element is called
A. element
B. daughter element
C. parent element
D. none of these
10 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons

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