1.

How would you test the presence of strach in leaves?​

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Answer:

The PRESENCE of STARCH in leaves can be TESTED by IODINE test. When we remove CHLOROPHYLL from leaf by boiling it in alcohol and then put 2 drops of iodine solution, its colour change to blue indicates the presence of starch.

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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