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

The number of protons inside a nucleus is called

Question # 2

The number of isotopes of hydrogen are

Question # 3

Curie is a unit of

Question # 4

Neutron was discovered by

Question # 5

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

Question # 6

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

Question # 7

The chemical properties of an element depends upon the number of

Question # 8

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

Question # 9

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

Question # 10

Neutron was discovered in

Question # 11

How many isotopes of helium are present?

Question # 12

U-238 present in the natural uranium is about:

Question # 13

Radioactivity is

Question # 14

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

Question # 15

Mass of proton is of order of

Question # 16

Nucleus of a hydrogen atom may contain:

Question # 17

Radium was discovered by:

Question # 18

The total charge of any nucleus is given as

Question # 19

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

Question # 20

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 # 21

Nucleus consists of

Question # 22

Binding energy per nucleus is

Question # 23

The unit of decay constant is

Question # 24

Marie curie and Pierre curie discovered:

Question # 25

Charge on proton is

Question # 26

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

Question # 27

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

Question # 28

Gamma rays consist of steam of

Question # 29

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

Question # 30

Radiation detector are used to

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
2 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
3 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
4 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
5 The energy acquired by a mass of 1g moving with the speed of light is
A. 3 x 108J
B. 9 x 1013J
C. 3 x 1013J
D. 9 x 1016J
6 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
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 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
9 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
10 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay

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