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Question

Choose the incorrect statement about acids.

A
They give H+ ions in water.
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B
They are sour in taste.
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C
They turn blue litmus paper red.
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D
They give pink colour with phenolphthalein.
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Solution

The correct option is D They give pink colour with phenolphthalein.
Acids are sour in taste and release positively hydrogen (H+) ions when added in water. When blue litmus is dipped in an acid, it turns to red.

Phenolphthalein is a synthetic indicator which is colourless and remains colourless when added in acidic solutions. It gives pink colour only with bases.

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