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ICSE Class X Biology 2020 Solved Papers

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SECTION - II

The diagram given below represents an experiment to prove the importance of a factor in photosynthesis. Answer the questions that follow:
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Question : 38
Total: 97
What is the purpose of keeping KOH in the flask?
Solution:  
KOH absorbs carbon dioxide. Whatever CO2 is released by the experimental leaf or already present in the flask is dissolved into the KOH. So now the flask is free from CO2.
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