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

Radiation detector are used to

Question # 2

A pair of quark and antiquark makes a:

Question # 3

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

Question # 4

1 amu is equal to

Question # 5

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

Question # 6

Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called

Question # 7

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

Question # 8

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

Question # 9

When a nucleus emits an alpha particle, it atomic mass decreased by

Question # 10

The chemical properties of an element depends upon the number of

Question # 11

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

Question # 12

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

Question # 13

The diameter of an atom is of the order

Question # 14

The number of isotopes of hydrogen are

Question # 15

When certain nucleus emits anα particle, its mass number:

Question # 16

γ-rays behave like a particle because they explain the

Question # 17

Marie curie and Pierre curie discovered:

Question # 18

The half life of uranium-238 is

Question # 19

Nucleus of a hydrogen atom may contain:

Question # 20

The rate of decay of a radioactive substance

Question # 21

Mass of proton is of order of

Question # 22

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 23

Neutron was discovered in

Question # 24

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

Question # 25

The rate of decay of radioactive substance

Question # 26

The penetration power ofβ-particle is

Question # 27

U-238 present in the natural uranium is about:

Question # 28

The figure 1.007276μ shows the mass of an:

Question # 29

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

Question # 30

Neutrons are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
4 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
5 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
6 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
7 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
8 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
9 The range ofβ-particle in air is greater than that ofα-particle by
A. 1000 times
B. 100 times
C. 15 times
D. 10 times
10 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity

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