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Question

An experiment was set up as shown in the figure alongside. Look at the figure and answer the following questions:
(i) What is the objective of this experiment?
(ii) Which plant is used in this experiment?
(iii) Which gas is evolved in this process?
(iv) What will happen to the rate of evolution of this gas if a pinch of sodium bicarbonate is added?
(v) What will happen if the apparatus is kept in dark?
Figure


Solution

(i) The objective of this experiment is to show that oxygen is evolved during photosynthesis.

(ii) Hydrilla is used in this experiment.

(iii) Oxygen is evolved during this process.

(iv) The rate of evolution of oxygen will increase, as the amount of carbon dioxide will increase on adding sodium bicarbonate. This will result in an increase in the rate of photosynthesis.

(v) If the apparatus is kept in dark, no photosynthesis will take and no oxygen will be evolved.

Biology
Frank Biology-II
Standard X

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