Question

9. The diagram below shows two test tubes A and B. Test tube A contains both a green water plant
and a snail. Both test tubes are kept in sunlight. Answer the questions that follow.
2015
Bubbles of oxygen
Green water plant
Snail
A
В
(a) Name the physiological process that releases the bubbles of oxygen.
(b) Explain the physiological process as mentioned above in (a).
(C) What is the purpose of keeping a snail in test tube B?
(d) Why does test tube B have more bubbles of oxygen?
(e) Give an example of a water plant that can be used in the above experiment.
(f) Write the overall chemical equation for the above process.​

Answer 1

Answer:

ANSWER

(i) In the given experiment, bubbles of oxygen are released due to the process of light reaction of photosynthesis.

Explanation:

ii) Photosynthesis is a process in which green plants (plant cells having chlorophyll) take in carbon-dioxide and water in presence of sunlight to produce glucose. It releases oxygen gas during the photolysis of water which is a part of the light reaction.

(iii) The purpose of keeping the snail in the test tube B is the production of carbon dioxide which is used by the plant.

(iv) Test tube B have more bubbles of oxygen because the rate of photosynthesis is more in test tube B as it gets more CO 2 from the snail.

(v) Hydrilla is a water plant which is used for such experiments.

iv)answer is in the image.