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Chemistry

Chemistry
Tear gas is :

Carbonyl chloride
Nitrous oxide
Chloroprene
Bleaching powder

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Chemistry
Among the following the hardest metal is

Iron
Tungsten
Platinum
Gold

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Chemistry
Saline soil contains

High concentration of salt
Lot of moisture
Hard rocks
None of these

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Chemistry
Which one of the following is used as preservative for foodstuff ?

Sodium Chloride
Sodium Benzoate
Picric acid
Glycerine

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Chemistry
It is dangerous to leave the car engine running in a closed garage, because it may cause serious pollution due to poisoning by emission of

CO2
CO
SO2
Unburnt petrol

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Chemistry
Which one of the following is known as the 'brown coal'?

Lignite
Coke
Anthracite
Bituminous

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