what process changes the colour of a halide-cyclohexane from orange to violet?

The color of the cyclohexane layer is due to the halogen dissolved in it. The solution of bromine in cyclohexane is orange, while that of iodine is violet.

The change of color from orange to violet is due to the conversion of bromine to iodine. A possible reaction is :
Br₂ + 2I⁻ → 2Br⁻ + I₂

The above reaction occurs when I⁻ is added to a solution of Br₂.


The answer: D. I⁻ added to a solution of Br₂.

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