3. How would you test the presence of starch in leaves?
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Presence of starch in leaves can be tested by iodine test. Iodine turns starch solution into blue-black colour. Pour few drops of dilute iodine solution on the boiled leaf. The leaf becomes blue-black which proves the presence of starch in it.
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when you will keep the leaf in water for sometime and see it facing towards the sun
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