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

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

Question # 2

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 3

The rate of decay of a radioactive substance

Question # 4

The energy acquired by a mass of 1g moving with the speed of light is

Question # 5

Beta particles are

Question # 6

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 # 7

Mass of proton is

Question # 8

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

Question # 9

1 amu is equal to.

Question # 10

Neutrons are

Question # 11

Rate of decay is actually described by.

Question # 12

Alfa particles are

Question # 13

The most abundant isotope of neon is

Question # 14

Marie curie and Pierre curie discovered:

Question # 15

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

Question # 16

How many isotopes of helium are present?

Question # 17

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

Question # 18

Binding energy per nucleus is

Question # 19

The isotope/s of hydrogen is /are:

Question # 20

Nucleon means:

Question # 21

Gamma rays consist of steam of

Question # 22

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

Question # 23

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

Question # 24

Which are not the elementary particles?

Question # 25

For Protium, the mass defect is:

Question # 26

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 27

The number if neutrons in the nucleus of 92U235are

Question # 28

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

Question # 29

Structure of the nucleus was explained by

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Mass of neutron is
A. 1.67 x 10-31kg
B. 1.67 x 10-27kg
C. 9.1 x 10-31kg
D. 1.67 x 10-19kg
2 1 amu is equal to.
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-24kg
D. 1.66 x 10-27kg
3 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
4 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
5 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
6 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
7 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
8 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
9 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
10 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these

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