Question

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

While using iodine in the laboratory, some drop of iodine fell on Paheli's socks and some fell on her teacher's saree. ... The drops of iodine are used to detect the presence of starch in the food items. The possible reason for the colour change of saree is due to the presence of starch.