Which test is used to distinguish between saturated and unsaturated hydrocarbons?

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Bromine water test

Chlorine water test

Luca’s test

Tollen’s test

answer is A.

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Detailed Solution

Bromine water has a red-brown colour because of the presence of bromine in it. When it is added to an unsaturated compound, then bromine gets added to the unsaturated compound and the red-brown colour of bromine is discharge.

So, if an organic compound decolourises bromine water, then it will be an unsaturated compound while saturated ones do not decolourise it.

A glance at other options:

The Lucas Test distinguish primary, secondary and tertiary alcohols.
Tollens' test, also known as silver-mirror test, distinguish between an aldehyde and a ketone.
A chlorine test is generally given to determine the presence and amount of chlorine.

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