Question

In the science laboratory, some of the iodine fell on the student's socks and some iodine fell on the teacher's saree. The iodine on the saree turned blue-black where as there is no change of colour observed on the student's socks, Why?​

Answer 1

Answer:

saress are polished with starch and iodine reacts with starch to form complex and changes the colour to blue black.thus when the iodine fell on Paheli's socks the colour did not change.

Explanation:

Amylose in starch is responsible for the formation of a deep blue color in the presence of iodine. The iodine molecule slips inside of the amylose coil. ... This makes a linear triiodide ion complex with is soluble that slips into the coil of the starch causing an intense blue-black color