The diagram below is an experiment conducted to study a factor necessary for Photosynthesis. Observe the diagrams and then answer the following questions:
(i) What is the aim of the experiment?
(ii) Name the test performed on the leaf and the solution used for the test.
(iii) What type of leaf was used for the experiment? Give an example.
(iv) What is the expected result of the above test on the parts labelled A and B?
(v) Give a balanced chemical equation to represent the process of Photosynthesis.
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(i) To show that chlorophyll is necessary for photosynthesis.
(ii) Starch test. Solution used in Iodine solution.
(iii) Variegated leaf / Coleus leaf (leaf having non green and green regions).
(iv) After performing starch test, Part A turns brown whereas Part B turns blue black. This is because only Part B which was green had starch produced by photosynthesis due to the presence of chlorophyll. The result proves that chlorophyll is necessary for photosynthesis.
(v) Balanced chemical equation representing the process of photosynthesis is given below:
$6CO_2 + 12H_2O \space \space \overset{\text{light energy}}{\underset{\text{chlorophyll}}{\longrightarrow}} \space \space C_6H_{12}O_6 + 6H_2O + 6O_2 \uparrow$