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Question
Describe one experiment you would perform to demonstrate the following phenomena: The germinating seeds to give out carbon dioxide.
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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