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 chemical properties of all the isotopes of an elements are

Question # 2

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

Question # 3

The nucleus/nuclei of hydrogen is/are:

Question # 4

Neutron was discovered by

Question # 5

Nucleon means:

Question # 6

Three quarks make:

Question # 7

Radium was discovered by:

Question # 8

Mass of neutron is

Question # 9

When certain nucleus emits anα particle, its mass number:

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

After alpha decay the atomic number of the atom

Question # 14

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

Question # 15

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

Question # 16

The unit of decay constant is

Question # 17

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

Question # 18

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 # 19

Marie curie and Pierre curie discovered:

Question # 20

The time required for a radioactive material to decrease in active by one half is called

Question # 21

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

Question # 22

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

Question # 23

Neutrons are

Question # 24

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

Question # 25

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

Question # 26

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

Question # 27

Radioactivity

Question # 28

The penetration power ofβ-particle is

Question # 29

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 30

The half lie of radium-226 is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Referring to the above figure, we can say that of all the elements, the most stable element is
A. Phosphours
B. Iron
C. uranium
D. Lithium
2 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
3 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
4 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
5 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
6 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
7 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV
8 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
9 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
A. deuterium
B. protium
C. tritium
D. none of these
10 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon

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