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Chemistry

Chemistry
Formic acid is produced by

Cockroaches
White ants
Red ants
Mosquitoes

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Chemistry
The purest form of water is

Distilled water
Tap water
Ground water
Rain water

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Chemistry
The third shell of an atom can have a maximum of ______ electrons

18
15
13
21

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Chemistry
Iron is prevented from rusting by coating with zinc. This process is called as

Reduction
Corrosion
Sublimation
Galvanisation

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Chemistry
Calcium salts used as fertilizer is :

Calcium Sulphate
Calcium Carbonate
Calcium Cyanide
Calcium Carbide

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Chemistry
Which one of the following is not coal variety?

Dolomite
Peat
Bituminous
Lignite

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