Question

Can the experiment to show the necessity of sunlight in photosynthesis be prepared with the attached leaf from plant? Give reason.

Answer 1

Hi,
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Here is your answer,
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Materials Required :
A potted plants, Aluminum foil, Ethyl alcohol, Iodine solution.

Procedure :
Take a potted plant and cover a part of one of its leaves with the help of Aluminium foil. Place the plant in sunlight pluck the leave after a few days and remove the aluminum from it. Take about 20 ml of ethyl alcohol in a boiling tube and dip the leaf in it. Place the boiling tube in a hot water bath. After some time, when the alcohol turns green, remove the leaf from the boiling tube. Wash the leaf with the help of warm water. Place a few drops of iodine solution on the leaf.

Observation :
Thw portion of leaf exposed to sunlight turns blue or blue black. The portion which was covered with the aluminum foil does not show any change in color.

Conclusion :
a. Leaves make starch as food by photosynthesis.
b. Sunlight is necessary for photosynthesis.

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HOPE YOU WILL UNDERSTAND MY WORDS, a request is here please as I am an ACE ranker I wish that to make my way easy for the GENIUS rank you should mark my answer brainlest if you wish then only ☺.
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