Question

If vegetable oil is made of lipids, then the oil would turn ____________ in the presence of Sudan III because it is an indicator of lipids.

orange/pink


black


red


blue

Answer 1

The Susan 3 indicator of lipids react with the lipids or triglycerides to form stain red colour. The Sudan 3 contains alcohol and the lipids or triglycerides are soluble in alcohol. Hence it reacts to form a stain red solution in ethanol which is stain red in colour. Hence the correct answer is red colour.