Question

Sonu is conducting the experiment to test the presence of starch in leaves. What will happen if she places the test tube containing leaf and alcohol directly over the burner instead of putting the test tube in the beaker of water and why?

Answer 1

Explanation:

The hot water kills the leaf and the alcohol breaks down the chlorophyll, taking the green color out of the leaf. When you put iodine on the leaves, one of them will turn blue-black and then other will be a reddish-brown. Iodine is an indicator that turns blue-black in the presence of starch. The leaf that was in the light turns blue-black, which demonstrates that the leaf has been performing photosynthesis and producing starch.

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