Question

Why does starch give blue black colour with iodine

Answer 1

Hey dear mate,

Answer:

This is due to the presence of more amylopectin than the amount of amylose .

Hope it helps u dear friend....

Answer 2

I am the biggest fan of Hasnain mate....

Here is your answer

Chemical Test for Starch or Iodine. Amylose in starch is responsible for the formation of a deep blue color in the presence of iodine. ... This makes a linear triiodide ion complex with is soluble that slips into the coil of the starch causing an intense blue-black color.