Question

One of the following organic compounds cannot decolourise the red-brown colour of bromine watet. This compound is:

Options

• C₁₄H₂₈

• C₇H₁₂

• C₆H₁₄

• C₉H₁₆

Answer 1

C₆H₁₄

Explanation:

This compound is hexane, a saturated alkane (C_nH_2n+2) that contains only stable single bonds, so it cannot react with bromine. Conversely, the other three options are unsaturated alkenes or alkynes containing reactive double or triple bonds. These unsaturated bonds rapidly undergo addition reactions with bromine, which is the process that removes the red-brown colour from the water.