Question

Which of the following set of substances contain acids? a)Grapes, Lime water b)vinegar, soap c)curd,milk of magnesia d)curd,vinegar

Answer 1

Vinegar and curd set of substances which consist of acid.

Option d

Explanation:

• Curd is produced from milk by the degeneration by lactic acid bacillus. Hence the acid which is present in it is known as lactic acid. On the other hand in case of vinegar the acid which is present in it is known as acetic acid.

• Acetic acid is a weak acid because it is an organic acid. However its PH value is less than that of a neutral substance that is less than 7.

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