Question

Which of the following precautions are to be taken for a successful run of the experiment to show that Oxygen is used during respiration : A) Cork should be airtight B) Seeds in the flask should be totally dry C) A small tube with freshly prepared soda lime should be placed in the flask D) The end of delivery tube should be above the water level. The correct answer is

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Answer 1

Answer:

A small tube with freshly prepared KOH solution should be placed in the flask so that it can absorb the carbon dioxide produced and create a vacuum in the flask. This vacuum is necessary for the water level to rise in the bent tube. Hence, the correct answer is option 2.

Answer 2

Answer:

C. A small tube with freshly prepared KOH solution should be placed in the flask so that it can absorb the carbon dioxide produced and create a vacuum in the flask. This vacuum is necessary for the water level to rise in the bent tube. Hence, the correct answer is option 2.