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The given figure is a demonstration of a...

The given figure is a demonstration of an experiment to show that carbon dioxide is essential for photosynthesis. What is the substance 'X', kept in watch-glass?

A

Potassium hydroxide

B

Sodium bicarbonate

C

Sodium carbonate

D

Potassium sulphate

Text Solution

Verified by Experts

The correct Answer is:
A
In the given experiment, plant is destarched first and then kept in the bell jar along with potassium hydroxide in a watch-glass. When this set-up is kept in sunlight for few hours and is then tested for starch, it will show negative result. This shows that plant fails to get `CO_(2)` to perform photosynthesis because `CO_(2)` gets absorbed by potassium hydroxide (KOH).
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