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

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

Question # 2

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 # 3

Beta particles are

Question # 4

Radioactivity was discovered by:

Question # 5

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

Question # 6

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

Question # 7

The rate of decay of radioactive substance

Question # 8

U-238 present in the natural uranium is about:

Question # 9

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

Question # 10

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

Question # 11

Charge on neutron is

Question # 12

Marie curie and Pierre curie discovered:

Question # 13

Rutherford performed an experiment on nuclear reactions in:

Question # 14

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

Question # 15

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

Question # 16

γ-rays behave like a particle because they explain the

Question # 17

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

Question # 18

β-particles are easily deflected by collisions than heavy

Question # 19

After alpha decay the atomic number of the atom

Question # 20

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

Question # 21

Radiation detector are used to

Question # 22

Three quarks make:

Question # 23

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

Question # 24

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

Question # 25

An alpha particle has a charge of

Question # 26

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

Question # 27

Neutron was discovered in

Question # 28

Mass of neutron is

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
2 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
3 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
4 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
5 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
6 1 amu is equal to.
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-24kg
D. 1.66 x 10-27kg
7 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
8 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
9 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
10 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)

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