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Chemistry

Chemistry
Which of the following metals causes Itai-Itai disease ?

Cadmium
Cobalt
Copper
Chromium

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Chemistry
Which of the following is not a gaseous air pollutant?

Hydrocarbon
Oxides of nitrogen
Oxides of sulphur
Smoke

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Chemistry
If the sewage is fully oxidized, the nitrogen is in the form of

Nitrates
Nitramines
Ammonia
Nitrites

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Chemistry
Which one is the lightest element in the periodic table

Helium
Hydrogen
Oxygen
Carbon

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Chemistry
In vulcanisation process, rubber can be hardened by adding

Sulphur
Alcohol
Nitrogen
Silicon

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Chemistry
Which of the following pollutants is main product of automobile exhaust ?

NO
CO2
CO
Hydrocarbons

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