Question

two potted green plantof the same kind were take to perform an experiment One of them was kept in a dark room while the other ome was kept in sunlight for 3-4 days A leaf from each of the plant was taken to perform thr iodine text which of the leaves turned blue in colour and why

Answer 1

the leaf of the plant kept in sunlight will turn blue black.

because

as it was kept in sunlight it was making food by photosynthesis, and we know that plants after photosynthesis store their food in form of starch.

as starch when added to iodine turns blue-black,the leaf of the plant kept in sunlight turns blue-black.

and

the leaf of the plant kept in dark could not make food by photosynthesis due to absence of light. so no starch is formed and the leaf did not turn blue-black.