ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

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 chemical behaviour of an atom is determined by

Question # 2

Fraction of the decaying atoms per unit time is called

Question # 3

According to Rutherford atomic model, the positive charge in an atom

Question # 4

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

Question # 5

The isotope/s of hydrogen is /are:

Question # 6

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

Question # 7

The diameter of an atom is of the order

Question # 8

Curie is a unit of

Question # 9

A pair of quark and antiquark makes a:

Question # 10

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

Question # 11

Gamma rays consist of steam of

Question # 12

Rutherford performed an experiment on nuclear reactions in:

Question # 13

The total charge of any nucleus is given as

Question # 14

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

Question # 15

Radioactivity was discovered by

Question # 16

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

Question # 17

Radiation detector are used to

Question # 18

Neon gas have three isotopes whose atomic numbers are

Question # 19

Mass of proton is

Question # 20

Binding energy per nucleus is

Question # 21

The nucleus/nuclei of hydrogen is/are:

Question # 22

γ-rays behave like a particle because they explain the

Question # 23

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

Question # 24

The half life of radioactive substances depends upon

Question # 25

Beta particles are

Question # 26

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

Question # 27

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

Question # 28

Mass of neutron is

Question # 29

β-particles are easily deflected by collisions than heavy

Question # 30

Radium was discovered by:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
2 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
3 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
4 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
5 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
6 For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is
A. A - Z
B. A
C. Z
D. A + Z
7 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
8 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
9 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
A. deuteron
B. deterium
C. protium
D. tritium
10 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen

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