Question

What happens to the colour of the leaf after pouring iodine solution on it?
(a) leaf from the plant kept in sunlight:
(b) leaf from the plant kept in dark :​

Answer 1

Explanation:

When you put iodine on the leaves, one of them will turn blue-black and the other will be a reddish-brown. Iodine is an indicator that turns blue-black in the presence of starch. The leaf that was in the light turns blue-black, which demonstrates that the leaf has been performing photosynthesis and producing starch.