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Solution


Q.

Which one of the following compounds does not decolourize bromine water             [2025]
1  
2  
3  
4  

Ans.

(3)

For decolourisation of bromine water, the molecule must be unsaturated hence cyclohexane cannot decolourise bromine water.

Phenol and aniline decolourise bromine water to give white ppt. of 2, 4, 6-tribromo derivatives.