Question # 1

The unit of radioactivity is:

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Bequerel

Henry

Pascal

Joule

The most useful tracer is.

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Strontium -90

Iodine -31

Cobalt -60

Carbon -14

Number of Isotopes of Neon gas are

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2

3

4

1

Binding energy per nucleon is maximum for

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Platinum

Iron

Uranium

Lead

The number of Isotopes of cesium are.

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4

32

22

36

When gama rays are emitted, the nuclear mass.

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Decreases by 4 units

Does not change

Increases by 2 units

Increase by 1 unit

I amu =

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9.31 MeV

931 MeV

9.031 MeV

None of above

The charge of an alpha particle is equal to

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-e

+e

-2e

2e

The types of quacks are.

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2

3

4

6

The amount of energy equivalent to 1 a.m.u is

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931.5 MeV

93.15 MeV

9.315 MeV

2.224 MeV

The particles which do not experience strong force are called.

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Baryons

Hadrons

Mesons

Laptons

How many neutrons are there in the nuclide Zn⁶⁶?

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22

30

36

66

Radioactivity happen due to the disintegration of

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Nucleus

Mass

Electrons

Protons

1 gray is equal to.

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1 JKg-1

1KgJ-1

1JKg

1 JKg-2

The moderator used in a nuclear reactor

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Sodium

Uranium

Graphite

Cadmium

X -rays are similar in nature to.

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Gama rays

Beta rays

Alpha rays

Cathode rays

Materials can be identified by measuring their

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Mass

Half life

Both a and b

None of a,b,c

Which one of the following is not affected by electric or magnetic field.

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Beta rays

Gama ryas

Alpha rays

Electron

Those elements whose charge number z is greater then __________ are unstable:

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80

79

82

83

The particles equal in mass but greater than proton are.

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Mesons

Baryons

Leptons

Hadrons

What is difference is isotopes

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Number of protons

Number of neutrons

Number of electrons

Charge number

Marie Curie and Pierre Curie discovered.

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Uranium

Uranium and Radium

Polonium and radium

Radium

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