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

The nucleus/nuclei of hydrogen is/are:

Question # 2

β-particles are easily deflected by collisions than heavy

Question # 3

Which of these is not a radiation detector

Question # 4

Radioactivity was discovered by

Question # 5

Radium was discovered by:

Question # 6

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

Question # 7

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

Question # 8

Rutherford performed an experiment on nuclear reactions in:

Question # 9

The unit of decay constant is

Question # 10

Radioactivity was discovered by:

Question # 11

Pair production take place when energy ofγ-rays photon is

Question # 12

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

Question # 13

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

Question # 14

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 # 15

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

Question # 16

Neutrons are

Question # 17

γ-rays are

Question # 18

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

Question # 19

Mass of proton is

Question # 20

Marie curie and Pierre curie discovered:

Question # 21

The number of protons inside a nucleus is called

Question # 22

Which are not the elementary particles?

Question # 23

The unit of decay constant is:

Question # 24

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

Question # 25

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

Question # 26

Mass of neutron is

Question # 27

When a charged particle passes through matter, it produces ionization, this effect is used in

Question # 28

Radiation detector are used to

Question # 29

The chemical behaviour of an atom is determined by

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
3 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
4 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron
5 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
6 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
7 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
8 Radiation detector are used to
A. measure intensity of radiation
B. measure energy of radiation
C. difference between different types of radiation
D. all the above
9 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
10 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143

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