ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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ECAT Physics Chapter 21 Nuclear Physics

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Question # 1

1 amu is equal to

Question # 2

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

Question # 3

Marie curie and Pierre curie discovered:

Question # 4

There is present in paraffin a large amount of:

Question # 5

Examples of moderators used in a fission reactor is/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

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

Question # 8

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

Question # 9

The number if neutrons in the nucleus of 92U235are

Question # 10

Proton was discovered by Rutherford in

Question # 11

Charge on proton is

Question # 12

In wilson cloud chamber, the air becomes saturated with:

Question # 13

Charge on neutron is

Question # 14

For Protium, the mass defect is:

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
2 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
3 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
4 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
5 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
6 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric
7 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
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 number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
10 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four

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