Question

What is the function of koh in the experimental set up to show that co2 is released during respiration is:?

Answer 1

The germinating seeds in the conical flask release CO2 during respiration, which is absorbed by the KOH solution kept in the small test tube. This creates a partial vacuum in the flask that forces the water up the delivery tube. Thus, it proves that germinating seeds produce carbon dioxide during respiration.

Precautions:

Answer 2

The rise in the level of water indicates that CO2 is produced by germinating seeds during respiration. Germinating seeds are active and respite fast.

These germinating seeds respire and produce CO2, that gets absorbed by the KOH solution. Thus, a vacuum gets created in the conical flask causing the air present in the bent glass tube to move into the conical flask.