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

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

Question # 2

Which of the following material has smaller has life

Question # 3

Radioactivity was discovered by:

Question # 4

Neutron was disvovered by:

Question # 5

The rate of decay of a radioactive substance

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

Pair production take place when energy ofγ-rays photon is

Question # 8

The total charge of any nucleus is given as

Question # 9

The chemical behaviour of an atom is determined by

Question # 10

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

Question # 11

Proton was discovered by Rutherford in

Question # 12

According to Rutherford atomic model, the positive charge in an atom

Question # 13

The reciprocal of decay constant λ of a radioactive material is:

Question # 14

Fraction of the decaying atoms per unit time is called

Question # 15

Neutron was discovered in

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
2 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
3 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
4 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
5 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron
6 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
7 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four
8 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
9 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
10 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
A. deuteron
B. deterium
C. protium
D. tritium

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