Question

Give reasons for the appearance of blue

colour in the exposed parts of leaf and non-appearance of blue colour in

the parts of leaf covered by black paper.​

Answer 1

Explanation:

Answer 》

The exposed part (to the sunlight) of the leaf turns blue on treatment with iodine whereas the covered part does not turn blue. The standard test for starch is treatment with iodine. Appearance of blue-black colour confirms the presence of starch.

Answer 2

Explanation:

The exposed part (to the sunlight) of the leaf turns blue on treatment with iodine whereas the covered part does not turn blue. The standard test for starch is treatment with iodine. Appearance of blue-black colour confirms the presence of starch.