Question

The seeds respirate at the time of germination. While showing this experiment a test tube with $KOH$ is kept in the conical flask to ______

• A. Supply oxygen necessary for respiration.
• B. Create space in the conical flask by absorbing CO2.
• C. Absorb water from the seeds and dry them.
• D. Make the air in the conical flask, acidic

Answer 1

The correct option is B Create space in the conical flask by absorbing CO2.

In the experiment, moist gram seeds are taken as they are actively respiring and releasing carbon dioxide. The carbon dioxide released is absorbed by KOH and forms Potassium Carbonate. KOH solution absorbs the carbon dioxide released during respiration of seeds, which creates a partial vacuum in the conical flask, causing the rise in the water level of the U-shaped delivery tube. A rise in the level of water shows that carbon dioxide is released during respiration.

So, the correct answer is B.