How would i know that a leafy shoot has released Carbon Dioxide during an experiment?
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To prove the necessity of carbon dioxide in photosynthesis following steps need to doInsert a part of the leaf of a destarched plant into a conical flask containing potassium hydroxide.Potassium hydroxide solution absorbs the carbon dioxide gas from the air present in the glass bottle.Leave the plant sunlight.After few hours, perform a starch test to this and another leaf of the same plant.Observation-Leaf exposed to the atmosphere are bluish black.Leaf exposed to KOH does not change to blue-black colourResult- Starch is present in the green part of the leaf.Conclusion- Presence of starch proves that chlorophyll is necessary for photosynthesis as it traps sunlight.
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