Question

What is the dream
of the 14 year old
girl in Hyderabad?​

Answer 1

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.