a student has sets up an apparatus to show that co2 is released during respiration. After 1 hour he observes no change in the water level in delivery tube. Write two possible reasons for the failure of the experiment.
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Answered by
44
The reason for no change in delivery tube can be, there was insufficient oxygen level in the laboratory.
Secondly, the failure of the experiment can be due to the unusual steps being followed by the student conducting the experiment in the laboratory.
It is always advisable for the students to follow the complete steps, taught in the classroom.
Answered by
40
The possible reasons are as follows.
1. The conical flask is not airtight hence CO2 is leaking from it.
2. As CO2 gas is light and rises up, if the short end of the tube is lowered too low that it comes in contact with the seeds lying under, CO2 will not pass through the tube.
Moreover,use of freshly prepared KOH solution is needed.
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