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Saturated and Unsaturated Hydrocarbons

Why unsaturat...

Question

Why unsaturated hydrocarbons decolourise bromine ?

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Solution

Bromine reacts with unsaturated compound to give addition products. So bromine is consumed in the reaction.
CH2=CH2 + Br2 --> CH2Br- CH2Br.
This leads to decolourisation of bromine.

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