Question

why do we boil the leaf in alcohol when we are testing for starch ​

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 the other will be a reddish-brown. Iodine is an indicator that turns blue-black in the presence of starch.

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Answer 2

Answer:

For the removal of a green pigment called chlorophyll, we boil leaf in alcohol to observe the color change from brown to blue after insertion of iodine.

Explanation:

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