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Chemistry

Chemistry
In vulcanisation process, rubber can be hardened by adding

Alcohol
Silicon
Nitrogen
Sulphur

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Chemistry
The chief source of naphthalene is

Charcoal
Coal-tar
Diesel
Camphor

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Chemistry
Milk tastes sour when it is left in open for some time. This happens due to the formation of

Carbonic acid
Lactic acid
Citric acid
Acetic acid

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Chemistry
Bridgmanite is

Name of a game
Name of a music
A bridge on the river Thames
Earth’s most abundant minera

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Chemistry
Urea is a

Sodium fertilizer
Phosphatic fertilizer
Nitrogenous fertilizer
Potassium fertilizer

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Chemistry
Aquaregia is a mixture of the following in the ratio 1 : 3 by volume

Conc. HNO3 and conc. H2SO4
Conc. HNO3 and conc. HCl
Conc. HCl and conc. HNO3
Dil. HCl and dil. HNO3

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