Question

While using iodine in the laboratory, some drops of iodine fell on Paheli’s socks and some fell on

her teacher saree. The drops of iodine on the saree turned blue-black while their colour did not

change on the socks. What can be the possible reason? ​

Answer 1

Answer:

While using iodine in the laboratory, some drop of iodine fell on Paheli's socks and some fell on her teacher's saree. ... The possible reason for the colour change of saree is due to the presence of starch. Paheli's socks did not have starch on it, thereby their colour did not change.

Answer 2

Answer:

Colour of saree changed due to the presence of starch (Carbohydrate) while socks doesn't change it's colour due to absence of starch.