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Chemistry

Chemistry
________ is used for making vinegar.

Tartaric acid
Oxalic acid
Acetic acid
Malic acid

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Chemistry
The molecular formula of phosphorous is

P3
P1
P2
P4

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Chemistry
The deterioration of a metal by an electrochemical process is commonly termed as

Erosion
Passivation
Abrasion
Corrosion

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Chemistry
The rusting of iron is a/an

Physical change
None of these
Electrochemical change
Electrical change

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Chemistry
Nitrogen is an essential constituent of all :

Vitamins
Proteins
Fats
Carbohydrates

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Chemistry
Type metal used in printing press is an alloy of

Lead and zinc
Lead and antimony
Lead and bismuth
Lead and copper

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