Question

How will you test the presence of starch in a leaf?

Answer 1

by pouring some iodine. if you put some iodine on leaves after boiling in alcohal its colour changes to blue which shows the presence of starch

Answer 2

$\huge\mathfrak{Answer :}$


Take a potted plant and put in a dark room.

After sometime pluck a leave from the plant.

Then boil it in water for 5 min to soft it and after doing that place the leave in a test tube containing alcohol.

Place the test tube in a beaker containg water.

Then, genlty heat the beaker till the alcohol dissolves in the chrolophyll and the leaves loses its green colour.

Wash the leaf and Water.

After doing that place the leaf on a plate and add a few drops of iodine solution.

The parts that turn blue black show the presence of starch in a leaf.

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