Question

A slice of bread gives a positive iodine test . However if the slice is thoroughly chewed the test is negative . Explain the reason..​

Answer 1

Answer:

Due to the absence of starch in the chewed bread, the iodine test shows a negative result. Long Answer When we chew the bread saliva digest the starch present in it hence it gives negative test.

Answer 2

Answer:

It digests the starch present in the bread as we chew it. Due to the absence of starch in the chewed bread, the iodine test shows a negative result