Question

Acids have a ______ taste and they turn ______ litmus to ______.

Answer 1

Acids have a sour taste and they turn blue litmus to red.

Explanation:

Acids naturally produce hydrogen ions (H⁺) in water, which trigger specific taste receptors on the tongue to register a sharp, sour sensation. This acidity alters the molecular structure of the chemical dyes in blue litmus paper. This structural change alters how the dye absorbs light, causing it to visually switch from blue to red.