100% pure ethanol is called ________.

Correct answer: (a) Absolute alcohol

Explanation

100% pure ethanol is called absolute alcohol. Ordinary distillation stops at about 95.6% (rectified spirit), because ethanol and water form an azeotrope, so the last water is removed by other means.

Denatured alcohol is ethanol made unfit to drink by adding methanol or other poisons. Ethanoic acid is acetic acid.