Which of the following substances are basic in nature? (A) Curd (B) Vinegar (C) Lime water (D) Ant's sting (E) Milk of magnesia
(C) and (E)
Curd contains lactic acid, which makes it acidic in nature, so it is not a basic substance.
Vinegar contains acetic acid, which makes it acidic in nature, so it is not a basic substance.
Lime water is a solution of calcium hydroxide, which is a base, so it is a basic substance.
An ant's sting injects formic acid into the skin, which makes it acidic in nature, so it is not a basic substance.
Milk of magnesia is a suspension of magnesium hydroxide, which is a base, so it is a basic substance.
Hence, the substances that are basic in nature are lime water and milk of magnesia, that is, (C) and (E).
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