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

The rate of decay of radioactive substance

Question # 2

How many isotopes of helium are present?

Question # 3

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

Question # 4

Different radioactive material have

Question # 5

A pair of quark and antiquark makes a:

Question # 6

A curie represents a very strong source of

Question # 7

The range of particle depends upon the factor

Question # 8

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

Question # 9

An alpha particle has a charge of

Question # 10

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

Question # 11

Marie curie and Pierre curie discovered:

Question # 12

Radioactivity was discovered by

Question # 13

There is present in paraffin a large amount of:

Question # 14

Radiation detector are used to

Question # 15

Binding energy per nucleus is

Question # 16

The isotope/s of hydrogen is /are:

Question # 17

The range ofβ-particle in air is greater than that ofα-particle by

Question # 18

Phenomenon of radioactivity is due to disintegration of

Question # 19

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 20

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

Question # 21

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

Question # 22

β-particles are easily deflected by collisions than heavy

Question # 23

The number if neutrons in the nucleus of 92U235are

Question # 24

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

Question # 25

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 26

The figure 1.007276μ shows the mass of an:

Question # 27

Gamma rays consist of steam of

Question # 28

Examples of moderators used in a fission reactor is/are:

Question # 29

Charge on neutron is

Question # 30

The half lie of radium-226 is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
2 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these
3 Pair production take place when energy ofγ-rays photon is
A. equal to 1.02 Mev-
B. greater than 1.02 Mev
C. less than 1.02 Mev
D. none of these
4 1 amu is equal to
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-34kg
D. 1.66 x 10-27kg
5 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
6 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron
7 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
8 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
9 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
10 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves

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