Question # 1

Energy released by conversion of 1 amu is

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200 MeV

931 MeV

233 MeV

243 MeV

Unit of decay constantλ is:

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ms

m^-1

m

S^-1

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 half life of radioactive elements depends upon

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Temperature

Nature of element

Amount of the radioactive substance

Pressure

The particles equal in mass but greater than proton are.

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Mesons

Baryons

Leptons

Hadrons

If the following particle have the same energy, which particle has the shortest wave length.

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alpha particle

Neutron

Beta particle

Proton

The radioactive decay obeys the law

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Subatomic particles are divided into groups.

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Photon

Laptons

Hadrons

All of these

The most abundant isotope of neon is:

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Neon 21

Neon 20

Neon 22

None of above

In Wilson cloud chamber, ß-particles leave

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Thin and continuous tracks

Thick and continuous tracks

No tracks

Thin and discontinuous tracks

Various types of cancer are treated by

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Carbon -14

Nickel -63

Cobalt -60

Strontium -90

Circulation of blood is studied by radio isotope.

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Cobalt -60

Phosphorus -32

Sodium -24

Iodine -131

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

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80

79

82

83

amu =

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1.06 x 10^-27 kg

1.6606 x 10^-27 kg

1.520 x 10^-21 kg

1.6606 x 10^-31 kg

A proton consists of quarks which are.

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Two up, one down

One up, two down

All up

All down

The first atomic reactor was introduced by

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Currie

Enrico Fermi

Newton

Bohr

Controlling rods inserted into the reactor are of metal:

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Aluminium

Cadmium

Magnesium

Copper

The bnding energy for nucleus A is 7.7 Me V and that for nucleus B is 7.8 MeV. Which nucleus has the larger mass?

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Nucleas A

Nucleus B

Less than nucleus

None of these

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