Give a test that can be used to differentiate between butter and cooking oil.

Answers (1)

Butter is an ester of saturated and cooking oil is an ester of unsaturated fatty acid. The test for unsaturation cab be used to distinguish between them. Decolourisation of bromine water is a test that is positive for unsaturated fatty acid and saturated fat that is butter does not change the colour of bromine water.

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