Question

Why do we use KOH solution and germinating seeds in an experiment to show that CO2 gas is released during respiration?

Answer 1

KOH solution is basically a basic compound which is usually used in such experiments to absorb the carbon dioxide produced by the germinating seed during the course of the experiment. **It is even used to fulfill the aims or needs of the experiment.

REMEMBER- THE LAST POINT IS A VERY IMPORTANT POINT WHICH WILL FETCH YOU MARKS IN THE BOARDS AND IT IS A STANDARD ANSWER TOO.....

this will solve your doubt:

KoH absorbs the CO2 and forms white precipitate  of Na2CO3 which shows the presence of carbon dioxide....