A liquid of formula C $_{3}$ H $_{8}$ O reacts with sodium, becomes turbid with Lucas reagent after about five minutes at room temperature, and gives a yellow precipitate with $I X_{2} / NaOH$ . The compound is

Answer: D

Reaction with Na shows an

O - H

group, so it is an alcohol. Turbidity in about 5 minutes indicates a secondary alcohol, and the iodoform result confirms the

CH X_{3} CH (OH) X^{-}

unit, so it is propan-2-ol.