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

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 # 2

The half life of uranium-238 is

Question # 3

The nucleus/nuclei of hydrogen is/are:

Question # 4

An alpha particle has a charge of

Question # 5

The number of isotopes of hydrogen are

Question # 6

The range ofβ-particle in air is greater than that ofα-particle by

Question # 7

Nucleus consists of

Question # 8

The rate of decay of a radioactive substance

Question # 9

The penetration power ofβ-particle is

Question # 10

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

Question # 11

The diameter of an atom is of the order

Question # 12

When a nucleus emits an alpha particles, its charge number decreases by

Question # 13

Neutron was suggested to be in the nucleus by:

Question # 14

Radioactivity

Question # 15

Which are not the elementary particles?

Question # 16

Radiation detector are used to

Question # 17

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

Question # 18

Heavy water is made of one oxygen atom and two atoms of:

Question # 19

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

Question # 20

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

Question # 21

For Protium, the mass defect is:

Question # 22

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 23

The isotope/s of hydrogen is /are:

Question # 24

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

Question # 25

Neon gas have three isotopes whose atomic numbers are

Question # 26

Structure of the nucleus was explained by

Question # 27

Radioactivity was discovered by:

Question # 28

Nucleus of a hydrogen atom may contain:

Question # 29

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

Question # 30

Mass of proton is of order of

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The counter, which also provides the power to the G.M. tube is called:
A. Thin mica window
B. thin glass window
C. Airy window
D. Wooden window
2 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
3 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
4 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
5 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
6 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
7 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
8 In radio-active decay, the original element which disintegrate to another element is called
A. element
B. daughter element
C. parent element
D. none of these
9 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
10 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these

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