Question

how would you test the present of starch in leaves​

Answer 1

Answer:

Iodine Solution

Explanation:

Iodine solution is used to test leaves for the presence of starch. You need to: heat a plant leaf in boiling water for 30 seconds (this stops its chemical reactions) heat it in boiling ethanol for a few minutes (this removes most of its colour)

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Answer 2

Answer:

Iodine test

Explanation:

1) Take a potted plant and keep it in a dark room for three days.

2) Select a leaf and cover the half portion of leaf with black strip paper, and leave that plant in sunlight for 6 hours.

3) Dip the leaf in boiling water for few minutes.

4) Immerse the leaf in alcohol containing beaker.

5) Now, carefully place the beaker in water bath and let the alcohol begin to boil.

6) Place the leaf in dilute iodine for few minutes.

7) Take the leaf out, and rinse off the iodine.

8) We can observe that the presence of starch in the uncovered area of leaf.