Question

3. Prove experimentally that plants produce carbon
dioxide during respiration.​

Answer 1

The rise in the level of water indicates that CO2 is produced by germinating seeds during respiration. Actually, the germinating seeds respire and produce CO2, which is absorbed by KOH solution. This creates a vacuum in the conical flask. The air present in the bent glass tube moves into the conical flask.

Answer 2

Answer:

Germinated gram seeds in a conical flask release CO, during respiration. The C02 released is absorbed by KOH present in the hanging test tube in conical flask. This creates a vacuum in conical flask which causes upward movement of water in the delivery tube leading to change in level of water in the delivery tube.