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Physical Properties of Alkenes

The structure...

Question

The structures of four organic compounds are shown below.

Which compounds decolourise bromine water?

1 and 2 only

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1, 2 and 4 only

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2 and 4 only

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3 and 4 only

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Solution

The correct option is C 2 and 4 only
Bromine water is an orange coloured solution of bromine. Alkenes readily decolourise bromine water once it is shaken with. Alkanes and carboxylic acids do not decolourise bromine water.

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