Question

Explain the purpose of.placing.potassium hydroxide in the conical flask

Answer 1

KOH solution kept in the test-tube inside the air-tight conical flask absorbs the evolved carbon dioxide released by germinating seeds; thereby creating a partial vacuum in the conical flask. So, an equal volume of water rises up in the tube. This indicates that the germinating seeds are actively respiring and CO2 gas is evolving in the process of germination.