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

Neutron was discovered in

Question # 2

In wilson cloud chamber, the air becomes saturated with:

Question # 3

Radioactivity was discovered by:

Question # 4

Binding energy per nucleus is

Question # 5

Radium was discovered by:

Question # 6

For Protium, the mass defect is:

Question # 7

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

Question # 8

The total charge of any nucleus is given as

Question # 9

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

Question # 10

Curie is a unit of

Question # 11

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

Question # 12

Radioactivity

Question # 13

There is present in paraffin a large amount of:

Question # 14

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

Question # 15

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

Question # 16

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

Question # 17

Alfa particles are

Question # 18

Radioactivity was discovered by

Question # 19

Nucleus of a hydrogen atom may contain:

Question # 20

The range of particle depends upon the factor

Question # 21

The number of isotopes of hydrogen are

Question # 22

The unit of decay constant is:

Question # 23

Neutron was disvovered by:

Question # 24

An alpha particle has a charge of

Question # 25

Rutherford performed an experiment on nuclear reactions in:

Question # 26

The unit of decay constant is

Question # 27

When certain nucleus emits anα particle, its mass number:

Question # 28

The rate of decay of radioactive substance

Question # 29

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

Question # 30

β-particles are easily deflected by collisions than heavy

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
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 Pair production take place when energy ofγ-rays photon is
A. equal to 1.02 Mev-
B. greater than 1.02 Mev
C. less than 1.02 Mev
D. none of these
4 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
5 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus
6 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
7 Radioactivity
A. is exhibited more by semiconductors in general
B. in exhibited more by the element when they are coupled
C. with other radioactive elements by a covalent bond
D. is an atomic property of radioactive elements
8 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C
9 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
10 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

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