Question

In the experiment to show that $C{O}_2$ is released during respiration', the small test tube of KOH solution is suspended inside the conical flask to absorb the :
(a) air of the flask
(b) moisture of the flask
(c) $O_2$ of the flask
(d) $C{O}_2$ of the flask released by the seeds

Answer 1

Respiration is a catabolic process which involves the breakdown of food or complex organic molecules into simpler products, with the release of energy. This process can take place either in the presence of oxygen (aerobic respiration) or in its absence (anaerobic respiration).
So in the given experiment the germinating seeds in the conical flask release $C{O}_2$ during respiration, which is absorbed by the KOH solution kept in the small test tube.
So correct option is
(d) $C{O}_2$ of the flask released by the seeds