Question

will a leaf taken from a potted plant kept in a dark room for a few days turn blue and black when tested for starch give reason​

Answer 1

Answer:

yes because the green pigment from it will escape

Answer 2

Answer:

No.

Explanation:

All the starch stored in the leaf would have been used up by the plant. No starch would be synthesised afresh due to non-availability of sunlight.

Hope it helps.