Question # 1

Radioactivity occurs naturally from all the elecments with atomic number greater than.

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62

72

80

82

The number of hydrogen isotopes;

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3

2

8

10

The Phenomenon of emission of radiations from radioactive elements is called:

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Doping

Allotropy

Radioactivity

Induction

In ........ henry Bequeral discovered.

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1895

1886

1896

1898

---------------- lasers are presently used for operating cataract and glaucoma.

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Argon

Neon

Helium

Hydrogen

The process of manufacturing food in pants;

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Respiration

Digestion

Fermentation

Photosynthesis

Recording of electrical activity of brain is said to be:

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ultrasound

MRI

E.E.G

E.C.G

During the preparation of the juice of sugarcane is heated from:

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100°C to 110°C

100° to 120°

100°C to 130°C

100°C to 140°C

What discovered radioactivity?

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Einstein

Newton

J.J. Thomson

Henry Becquerel

Which radiation have zero mass number

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Alpha radiation

Beta ratiation

Gamma radiation

None of these

The light of laser is:

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monochromatic

dichromatic

trichromatic

Tetrachrmatic

The rays which are liberated from metal due to collision of fast moving electrons:

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Alpha rays

Beta rays

Gamma rays

x - rays

Emission of ratiations from nucleus is said to be

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Chemical reaction

Atomic reaction

Radioactivity

Nuclear fission

In engineering department besides heavy machinery the role of ....... industry is examplary.

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Cottage

Steel

Electrical

Paper

Element having atomic numebr greater than.......... go on emitting radiations.

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80

92

82

83

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