Question

Iodine test:
put iodine solution on the leaf.

Observation: blue black colour will be observed on the leaves of the plant kept in sunlight which indicates the presence of starch ​

Answer 1

Answer:

Blue-black colour is not observed on the leave of the plant number 1 (that kept in dark room). It indicates the absence of starch. Leaves of the number 2 plant (that kept in sunlight) turns blue-black colour. It indicates the presence of starch.