Question

WRITE THE TEST FOR PRESENCE OF STARCH IN A LEAF.

Note that meaningless, spam and answers which don't help will be reported and deleted

Answer 1

Answer:

Heat a plant leaf in hot water for 30 seconds(to kill the leaf)

add the leaf to ethanol(ethanol dissolves the chlorophyll and turns the leaf white)

wash the leaf with water to make it soft and to rehydrate it

add a few drops of iodine. Starch turns blue black in the prescence of iodine. so if it has starch, the leaf will turn blue/black

Answer 2

Answer:

Your question reminds me of Hugh Grant's song, "Meaningless Kiss."

Anyways, I'll answer it in the "Explanation" section.

Explanation:

To test leaves for the presence of starch, the leaf is boiled in water and then the boiled leaf is placed in a boiling tube containing 90% ethanol (ethyl alcohol). The ethanol boils and the green colouring (chlorophyll) is removed from the leaf. The iodine reagent is then added, which causes the green areas on the leaf, where starch is supposedly present, to turn to a blue-black colour. This indicates the presence of starch in the leaf.

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I hope you are helped.