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 number if neutrons in the nucleus of 92U235are

Question # 2

The half lie of radium-226 is

Question # 3

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

Question # 4

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 5

When certain nucleus emits anα particle, its mass number:

Question # 6

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

Question # 7

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 8

Rutherford performed an experiment on nuclear reactions in:

Question # 9

γ-rays behave like a particle because they explain the

Question # 10

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 11

How many isotopes of helium are present?

Question # 12

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

Question # 13

Which are not the elementary particles?

Question # 14

U-238 present in the natural uranium is about:

Question # 15

The nucleus left after the emission of some radiation is called:

Question # 16

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

Question # 17

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

Question # 18

When certain nucleus emits aβ-particles, is mass number:

Question # 19

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

Question # 20

Charge on neutron is

Question # 21

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 22

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 23

Radioactivity was discovered by:

Question # 24

Marie curie and Pierre curie discovered:

Question # 25

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

Question # 26

Binding energy per nucleus is

Question # 27

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 28

The half life of uranium-238 is

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
2 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
A. nuclear fission
B. nuclear fusion
C. man defect
D. radioactivity
3 The counter, which also provides the power to the G.M. tube is called:
A. Thin mica window
B. thin glass window
C. Airy window
D. Wooden window
4 In radioactive decay, the new element which is formed due to the disintegration of original element is called
A. element
B. daughter element
C. parent element
D. none of these
5 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
6 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
7 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
8 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time
9 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
10 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

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