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

Question # 2

Nucleus of a hydrogen atom may contain:

Question # 3

Radium was discovered by:

Question # 4

β-particles are easily deflected by collisions than heavy

Question # 5

The penetration power ofβ-particle is

Question # 6

In wilson cloud chamber, the air becomes saturated with:

Question # 7

The number of protons inside a nucleus is called

Question # 8

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 9

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

Question # 10

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

Question # 11

Mass of proton is

Question # 12

The figure 1.007276μ shows the mass of an:

Question # 13

Proton was discovered by Rutherford in

Question # 14

Radioactivity was discovered by

Question # 15

The emission of radiations take place in elements, having charge number greater than

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
2 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
3 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C
4 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
5 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
6 The amount of energy equivalent to 1 a.m.u is
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev
7 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
8 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
9 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
10 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four

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