Question

green leaves of a plant which are exposed to sunlight and give a positive iodine test​

Answer 1

Answer:

Explanation:

Iodine gives blue-black colour with starch. Only green parts of the leaf prepare food (starch). In leaf 'P', starch will not be synthesized as CO2is needed for preparing food, so iodine will not show any change in colour. In leaf 'R', the exposed part of the leaf will give positive result with iodine while the covered part will give negative        I result. In leaf 'Q', green part will show change in colour i.e., it will turn blue black performing iodine test.    

Answer 2

Answer:

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Explanation:

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