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Chemistry

Chemistry
The most common cause of pollution of air is

Smoke
Sulphur dioxide
Carbon dioxide
Carbon monoxide

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Chemistry
Which one of the following was used as a chemical weapon in the first world war ?

Carbon monoxide
Hydrogen cyanide
Mustard gas
Water gas

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Chemistry
Which of the following appeared to be with a significant potential for accumulation through food chains ?

Lindane
Parathion
DDT
Carbary

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Chemistry
The inert gas used as beacon light is

Ne
Kr
He
Ar

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Chemistry
What is the principal ore of aluminium ?

Copper
Bauxite
Lignite
Dolomite

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Chemistry
Nitrogen fixation is a process of

Assimilation of nitrate
Utilisation of nitrogen gas
Conversion of molecular nitrogen to ammonia
Conversion of organic nitrogen to proteins

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