Question

2.
In an experimental set up to demonstrate that CO2 is given out during
respiration, the KOH solution should be kept in
A) Beaker
NARAY B) bent tube
C) Without seeds in the flask
D) in a small test tube in the flask​

Answer 1

So, inside the air tight container KOH solñ is kept as Potassium Hydroxide absorbs Carbon dioxide . So , if all the CO2 will be absorbed a partial vacuum is created in the test tube .