the the presence of double or triple Bond in a compound is the sign of
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Explanation:
The bromine test is a qualitative test for the presence of unsaturation (carbon-to-carbon double or triple bonds) and phenols. An unknown sample is treated with a small amount of elemental bromine in an organic solvent, being as dichloromethane or carbon tetrachloride. Presence of unsaturation and/or phenol in the sample is shown by disappearance of the deep brown coloration of bromine when it has reacted with the unknown sample.
So, the correct option is 'Bromine water'.
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