Question

3. Explain with an activity that carbon dioxide and water are necessary for
photosynthesis.?​

Answer 1

1. Take two healthy potted plants which are nearly the same size.

2. Keep them in a drak room for three days.

3. Now place each plant on separate glass plates place a watch glass containing potassium hydroxide by the side of one of the plants. The potassium hydroxide is used to absorb carbon dioxide. Watch glass containing potassium hydroxide Experimental set up (a) with potassium hydroxide

(b) Without potassium hydroxide.

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Answer 2

insert a part of the leaf of a distarched plant into a clonical flask containing pottasium hydroxide.pottasium hydroxide solution absorbs the carbon dioxide gas from the air present ni the glass bottle. leave the plant sunlight. after few hours perform a starch test to this and another leaf of the same plant