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 unit of decay constant is

Question # 2

The rate of decay of radioactive substance

Question # 3

Alfa particles are

Question # 4

In 1932 Chadwick discovered

Question # 5

β-particles are easily deflected by collisions than heavy

Question # 6

Charge on proton is

Question # 7

A pair of quark and antiquark makes a:

Question # 8

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 9

There is present in paraffin a large amount of:

Question # 10

Nucleus of a hydrogen atom may contain:

Question # 11

Structure of the nucleus was explained by

Question # 12

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

Question # 13

The chemical properties of all the isotopes of an elements are

Question # 14

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

Question # 15

Which of the following material has smaller has life

Question # 16

Radioactivity was discovered by:

Question # 17

γ-rays are

Question # 18

The unit of decay constant is:

Question # 19

U-238 present in the natural uranium is about:

Question # 20

Which are not the elementary particles?

Question # 21

Mass of proton is

Question # 22

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 # 23

A mass spectrograph sort out

Question # 24

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

Question # 25

Radiation detector are used to

Question # 26

Binding energy per nucleus is

Question # 27

Mass of neutron is

Question # 28

Neutron was disvovered by:

Question # 29

Neutron was discovered by

Question # 30

Gamma rays consist of steam of

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Mass of neutron is
A. 1.67 x 10-31kg
B. 1.67 x 10-27kg
C. 9.1 x 10-31kg
D. 1.67 x 10-19kg
2 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
3 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
4 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
5 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
6 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
7 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
8 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
9 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
10 Maric Curie and Pieree Curie discovered two new radioactive elements, which are called
A. polonium uranium
B. uranium and radium
C. polonium and radium
D. none of these

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