Why is a leaf treated with boiling water and ethanol before it is subjected to the iodine test?
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Iodine solution is used to test leaves for the presence of starch. ... add the leaf to boiling ethanol in a water bath for a few minutes (the boiling ethanol dissolves the chlorophyll and removes the green colour from the leaf - it turns white so it is easy to see the change in colour)
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Answer: because to remove chloropyll
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