Question

There is a cyclic compound `X` which is unsaturated and burns with sooty flame. Identify `X` and write its structural formula. Will it decolorize bromine water?

• A. C₅ H_12, yes it decolorizes bromine water.
• B. C₃ H₈, it doesn't decolorize bromine water.
• C. C₆ H_6, it doesn't decolorize bromine water.
• D. C₆ H_6, it decolorizes bromine water.

Answer 1

The correct option is C C₆ H_6, it doesn't decolorize bromine water.

Benzene C₆ H₆

Out of the given options, first two compounds are not cyclic compounds. And the cyclic compound that burns with sooty flame is benzene. It does not decolourise bromine water because it does not undergo addition reaction.