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Chemistry

Chemistry
The chief constituent of vinegar is

Oxalic acid
Salycylic acid
Formic acid
Acetic acid

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Chemistry
When iron rusts, its weight

Remains the same
First increases and then decreases
Increases
Decreases

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Chemistry
The chemical name of 'laughing gas' is

Nitrous oxide
Nitrogen dioxide
Nitric oxide
Nitrogen pentoxide

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Chemistry
KMnO4 can be used as a/an

Fertiliser
Insecticide
Disinfectant
Pesticide

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Chemistry
Which among the following is pure matter ?

Carbon–dioxide
Air
Brass
Iron

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

Sodium Benzoate
Glycerine
Picric acid
Sodium Chloride

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