Question

give a chemical test to distinguish between butter and cooking oil

Answer 1

We can distinguish between butter and cooking oil using bromine water test-

Adding bromine water to both, butter will not decolourise bromine water while cooking oil will.

This is because butter is saturated while oils are unsaturated hydrocarbons.

Answer 2

Butter and cooking oil are commonly used fat compounds in our household's kitchen.

There are many chemical tests , which we can perform to distinguish between the butter and the cooking oil.

But,the most easy chemical test is bromine water test.If we mix bromine water in butter and cooking oil,the cooking oil will be decolourised due to the presence of unsaturated hydrocarbons in it.