Question

A student has set up "CO₂ is released during respiration”. After about 1 hour he observes no change in the water level in the delivery tube. Write two possible resons for the failure of the experiment. 

Answer 1

(i) The setup was not air tight

(ii) Geminating seeds were not moist

(iii) One end of U-shaped delivery tube is placed in conical flask and the other end was not immersed in the water of the beaker.