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Q.

In half leaf experiment, to maintain ${CO}_{2}$ -free conditions in the test tube where the upper half of the leaf is inserted, the chemical used to absorb ${CO}_{2}$ is

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a

Potassium hydroxide

b

Calcium hydroxide

c

Sodium hydroxide

d

Calcium chloride

answer is A.

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Detailed Solution

KOH absorbs ${CO}_{2}$ and makes the air of the test tube free of ${CO}_{2}$ .

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In half leaf experiment, to maintain CO2-free conditions in the test tube where the upper half of the leaf is inserted, the chemical used to absorb CO2 is