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Chemistry

Chemistry
The Bhopal tragedy was caused by the gas

Methyl isocyanate
Phosgene
Chlorine
Carbon monoxide

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Chemistry
In chemical terms, what are alums used for purifying water for drinking purposes ?

Nitrates of aluminium
Double nitrate
Hydrated chlorides
Double sulphates

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Chemistry
The term 'brown air' is used for

Photochemical smog
Acid fumes
Sulphurous smog
Industrial smog

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Chemistry
Galena is a mineral of

Calcium
Lead
Gold
Iron

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Chemistry
If there is one million Mg2+ ions in MgCl2, how many chloride ions are there?

Ten million
One million
Two million
Half a million

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Chemistry
Which of the following is used as a preservative to protect processed food?

Saccharin
BHT
Sodium metabisulphite
Sodium sulphate

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