Question

Choose the incorrect statement about acids.

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

Answer 1

The correct option is D They give pink colour with phenolphthalein.

Acids are sour in taste and release positively hydrogen (${\text{H}}^{+}$) 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.