Question

4. Given below is the diagram of an experimental setup:
(a) What is the objective of this experiment ?
(b) Will it work satisfactorily? Give reason.
(c) What alteration(s) will you make in it for obtaining expected result?
(d) Would you take any step before starting the experiment?Describe this step and explain its necessity.​

Answer 1

Answer:

Explanation:

a. To demonstrate the importance of carbon dioxide in photosynthesis

b. No, the experiment will not work satisfactorily, as the beaker contains lime water and not potassium hydroxide to absorb CO­2.

c. Place potassium hydroxide in the beaker instead of lime water

d. Before starting the experiment, it is necessary to destarch the leaves of the plant by keeping the plant in complete darkness for 48 hours. This is because if the plant is not destarched, then the experiment will give false results because starch stored previously may be detected in the leaf placed in the beaker even if no starch is produced during the experiment.