Question

Ankita bought some glucose powder. She felt it was adulterated with starch powder. How would she test it?

• A. By sieving
• B. By dissolving it in water
• C. By iodine test
• D. All of the above

Answer 1

The correct option is C By iodine test

Starch gives blue black colour with iodine. Amylose is present in starch that reacts with the iodine to give a blue-black colour. The only difference between glucose and starch is that glucose can easily dissolve in water but if it mixed with starch, it will not dissolve completely. In the given condition, So, the correct option is C.