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In the experiment to show that light is necessary for photosynthesis, the plucked leaf is boiled in ethanol and then washed with water. After this, it is tested for the presence of carbohydrate by a chemical which is

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In the experiment to show that light is necessary for photosynthesis, the plucked leaf is boiled in ethanol and then washed with water. After this, it is tested for the presence of carbohydrate by a chemical which is

(1) salt solution

(2) sugar solution

(3) iodine solution

(4) starch solution

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Correct answer: (3) iodine solution

Explanation:

The chemical used for testing the leaf is iodine solution. It is used to test the presence of starch in leafs.

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