Question

 A student is to conduct an experiment to show CO2 is released during respiration. List two precautions that he/she must take for obtaining correct observation.​

Answer 1

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• Carbon dioxide is released during respiration by plants.

• This can be proved by an experiment by taking germinating seeds in a plant in a flask.

• KOH solution is kept inside the flask with the help of a thread.In another beaker coloured water is kept.

• The rise in the level of the water is observed.

Answer 2

Explanation:

Carbon dioxide is released during respiration by plants. This can be proved by an experiment by taking germinating seeds in a plant in a flask.

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Keep the conical flask airtight.

Fix the shorter end of the glass tube in such a way that it does not touch the seeds.

Use freshly prepared KOH solution.