a student conducted an experiment to show CO2 us released during respiration . list two precautions that he/ she must take for obtaining correct observation
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observe experiment very carefully and wash all the test tube carefully and store con in a test tube which is clean
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1.care must be taken that expired breath totally go to the test tube, filled with lime water.
2 . attentive while performing the experiment.
2 . attentive while performing the experiment.
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