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In the experimental setup to show that CO2 is released during respiration, name the substances taken in the small test tube kept in the conical flask. State its function and the consequence of its use.

Posted by Anukriti Khare 5 years, 5 months ago

CBSE > Class 10 > Science

1 answers

Meghna Thapar 5 years, 1 month ago

Potassium hydroxide is used in the experiment for the absorption of CO2 from the plant released during respiration. When KOH absorbs CO2, it creates a vacuum in the flask. The air present in the bent glass tube moves into the conical flask. This pulls the water in the bent tube further up. Carbon dioxide released by respiration of seeds will not be absorbed. So, partial vacuum will not be created and thus there will be no rise in the level of water in the glass tube. If moisture is not available, seeds will dry up and rate of respiration would fall.

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CBSE > Class 10 > Science