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

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

Question # 2

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

Question # 3

1 amu is equal to.

Question # 4

How many isotopes of helium are present?

Question # 5

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

Question # 6

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

Question # 7

Alfa particles are

Question # 8

The rate of decay of radioactive substance

Question # 9

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

Question # 10

The half life of uranium-238 is

Question # 11

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

Question # 12

Charge on proton is

Question # 13

A mass spectrograph sort out

Question # 14

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

Question # 15

The unit of decay constant is:

Question # 16

The diameter of an atom is of the order

Question # 17

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

Question # 18

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

Question # 19

The half life of radioactive substances depends upon

Question # 20

Radiation detector are used to

Question # 21

The chemical behaviour of an atom is determined by

Question # 22

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

Question # 23

Nucleus consists of

Question # 24

Neutron was disvovered by:

Question # 25

There is present in paraffin a large amount of:

Question # 26

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

Question # 27

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

Question # 28

Beta particles are

Question # 29

In 1932 Chadwick discovered

Question # 30

When certain nucleus emits anα particle, its mass number:

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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 If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Infinity
3 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is
A. A - Z
B. A + Z
C. Z
D. A
4 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
5 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
6 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
7 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
8 1 amu is equal to
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-34kg
D. 1.66 x 10-27kg
9 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)
10 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these

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