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BOD and COD

A student con...

Question

A student conducted an experiment to show $C O_{2}$ is released during respiration. List two precautions he/she must take for obtaining correct observation.

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Solution

Following are the precaution student take in the experiment:-
A) The apparatus should be airtight especially conical flask.
B) Freshly prepared KOH should be used.
C) Put the shorter end of glass in a way it avoids touching the seeds.

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