Chemistry - Biomolecules Question with Solution | TestHub

Question Explanation:

Identify the carbohydrate(s) that develop a blue color on treatment with iodine solution.

Concept:

Iodine test for Starch (Amylose).

Solution:

The formation of a characteristic blue-black color upon mixing with iodine solution is the qualitative test for Starch.

This color is specifically due to the interaction of iodine molecules with the helical coil structure of Amylose (the linear component of Starch).

Starch (polysaccharide) → Positive (Blue color).

Amylose (Starch component) → Positive (Blue color).

Glucose and Fructose (monosaccharides) → Negative.

Final Answer: The correct option are (B) and (C).