(4x+5) (4x+1)फुल एक्स प्लस 5 ब्रैकेट 4 एक्स प्लस वन
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The student dipped the leaf in boiling water for a minute to kill the cells.
Then he boiled the leaf in alcohol/methylated spirit over a water bath to remove chlorophyll. The leaf becomes hard and brittle.
He then places the leaf in hot water to soften it.
Next the student spreads the leaf in a dish and pours iodine solution on it. The presence of starch is indicated by a blue-black colour.
The uncovered portion (exposed to sunlight) turned blue-black colour and the covered portion showed brown colour. The difference in the colours of covered and uncovered part of leaves indicates the importance of sunlight in photosynthesis.
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