The figure given below represents an experiment to demonstrate a particular aspect of photosynthesis. The alphabet ' $A$ ' represents a certain condition inside the flask.
(i) What is the aim of the experiment?
(ii) Identify the special condition inside the flask.
(iii) Name an alternative chemical that can be used instead of $K O H$ .
(iv) In what manner do the leaves $1$ and $2$ differ at the end of the starch test?

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Solution

(i) The aim of the experiment is to show the requirement of $C O_{2}$ for the process of photosynthesis.
(ii) Leaf inside the flask does not get atmospheric $C O_{2}$ .
(iii) NaOH
(iv) Absence of $C O_{2}$ inside the flask does not allow the leaf 1 to produce starch and the leaf does not turn black at the end of starch test while the leaf 2 turns black.

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