The addition of Br₂ is used as the reaction to distinguish between alkanes and alkenes.What is the observation that accompanies this test? A) A bright red color is produced when Br₂ reacts with an alkene. B) Bromine dissolves in alkanes but not in alkenes. C) Bromine is a dark red liquid.When it adds to the double bond of an alkene to make the dibromide,it becomes colorless. D) The red color of bromine disappears when it dissolves in alkanes. E) Bromine reacts with alkanes to form a precipitate.

Question

Quizplus · Accepted Answer

When Br2 is added to an alkene, it undergoes addition reaction to form a dibromoalkane which is a colorless liquid. As a result, the red color of Br2 disappears. This does not happen in alkanes, hence no color change is observed. This reaction is used to distinguish between alkanes and alkenes.

The Addition of Br2 Is Used as the Reaction to Distinguish

The Addition of Br₂ Is Used as the Reaction to Distinguish