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Question
Describe one experiment you would perform to demonstrate the following phenomena: The germinating seeds to give out carbon dioxide.
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Solution
(1) Take two flasks 'A' and' B'.
(2) Place some wet cotton wool at the bottom of both the flasks.
(3) Place some soaked seeds of pea in flask A and an equal number of boiled or dead seeds in flask B. Add some carbolic acid to flask B to prevent the growth of bacteria on dead seeds.
(4) Cork the flasks and keep them undisturbed for few days.
(5) After few days, the seeds in flask A will have germinated and the seeds in flask B do not show any signs of germination.
(6) The gases in each of the flasks are then tested by removing the cork and tilting the flask over a test tube containing limewater and then shaking up the test tube.
(7) The expected CO2 present in flask A will turn limewater milky showing that germinating seeds give out CO2, while the gas in flask B will show no effect on limewater.
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