Question: In the experimental set up to show that ’’CO₂ is given out during respiration’’, name the substance taken in the small test tube kept in the conical flask. State its function and the consequence of its use. [CBSE Delhi, Set 1, 2019]
Answer: The chemical kept in the test tube is KOH–Potassium hydroxide. The function of this chemical is to absorb the vapours of CO₂. Consequences: The water level rises in the test tube dipped.