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Chemistry

Chemistry
Bleaching powder is used in drinking water as a/an

Disinfectant
Antiseptic
Coagulant
Antibiotic

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Chemistry
Sulphur dioxide level in the atmosphere can be reduced by using

More efficient car engines
Catalytic converters in industry
Low - sulphur fuels
Static electricity to attract it in factory chimneys

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Chemistry
The main source of carbon monoxide is

Industrial process
Solid waste disposal
Transportation
Fuel combustion

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Chemistry
What is the covalency of nitrogen in ammonia molecule

4
2
5
3

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Chemistry
Which of the following fibres catches fire least ?

Rayon
Nylon
Cotton
Terricot

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Chemistry
Which of the following alkali metals has highest specific heat?

Caesium
Rubidium
Lithium
Potassium

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