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CHEMISTRY

Chemistry
White phosphorus is generally kept under

Kerosene oil
Glycerine
Alcohol
Water

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Chemistry
Which metal is extracted from sea water?

Beryllium
Potassium
Magnesium
Aluminium

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Chemistry
The rusting of iron is a/an

Electrical change
Electrochemical change
None of these
Physical change

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Chemistry
When iron rusts, its weight

Remains the same
Decreases
Increases
First increases and then decreases

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Chemistry
Ozone layer of atmosphere absorbs:

Cosmic rays.
Infra-red rays
Ultraviolet rays
All radiations of Light

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