Two-organic substances are labelled K and L if K gave a blue-black colour with iodine solution and L gave a deep red precipitate with Million's reagent, it ...

Assessment: WAEC SSCE - Chemistry - 2000 (Objective) Subject: Chemistry

Question 1 Report

Two-organic substances are labelled K and L if K gave a blue-black colour with iodine solution and L gave a deep red precipitate with Million's reagent, it can be concluded that
Answer Details
From the given information, it can be concluded that K is a carbohydrate and L is a protein. This is because the blue-black colour with iodine solution is a characteristic test for the presence of starch, which is a type of carbohydrate. On the other hand, the deep red precipitate with Million's reagent is a characteristic test for the presence of proteins. Therefore, based on the tests carried out, K is a carbohydrate and L is a protein.

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