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Why do we boi...

Question

Why do we boil the leaf in alcohol, when we are testing it for starch?

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Solution

Boiling the leaf in alcohol removes chlorophyll present in it. By this we can properly identify the starch present in the leaf.

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During starch test, why is leaf boiled in alcohol for a short time

Q. Why is the leaf boiled in alcohol before the test for starch in iodine solution??

Q. (a) why is the leaf boiled in alcohol for a short time?
(b) why do we dip the leaf in water before adding the iodine solution?

Why is the leaf boiled in water and alcohol before testing for the presence of starch?

Q. A student is performing an experiment to show that sunlight is necessary for photosynthesis. In the first stage, he keeps a potted plant with green leaves in a dark place for about 3 days. Towards the end of the experiment, he boils one leaf in alcohol before using iodine for testing starch.
(a) Why is the plant kept in a dark place for about 3 days?
(b) Why is the leaf boiled in alcohol before testing for starch with iodine?

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