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Chemistry

Chemistry
DDT and BHC may act as

None of these
Carcinogens
Allergens
Asthematic agents

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Chemistry
The oxidation number of nickel in K4[Ni(CN)4] is

Zero
4
8
–4

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Chemistry
Ferrous sulphate is used in water treatment as a/an

Coagulant aid
Reducing agent
Oxidizing agent
Adsorbent

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Chemistry
Gold dissolves in

Nitric acid
Aqua-regia
Hydrochloric acid
Acetic acid

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Chemistry
The increasing abundance of green house gases in atmosphere has led to the following effect except

Carbon dioxide ferilization effect
Global warming
Depletion of ozone layer in the stratosphere
Oxygen fertilization effect

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Chemistry
In deep-sea diving, divers use a mixture of gases consisting of oxygen and

Helium
Hydrogen
Argon
Nitrogen

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