Question

describean experiment to prove that carbondioxide is essintial for photosynthises draw its labelled dagram

Answer 1

Answer:

Keeping them in a dark room detaches two carbon plants. They are watered properly during this period. Each pot is enclosed in a transparent polythene bag as shown in the figure.

A Petri dish containing soda lime (potassium hydroxide) is placed in one of the pots to a absorb any carbon dioxide present in the polythene bag. In the other pot, a Petri dish is placed containing sodium bicarbonate solution, which would produce carbon dioxide.

The plants are then left in light for several hours. A leaf from each pot is detached and tested for starch. The leaf from the pot containing soda lime does not turn blue; soda lime had absorbed any carbon dioxide present in the bag.

The leaf from the other pot where carbon dioxide was being released by the sodium bicarbonates solution turns blue indicating the presence of starch. These results show that carbon-dioxide is essential for photosynthesis.

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Answer 2

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Answer:

Answer:Aim:

To experimentally show that carbondioxide is essential for photosynthesis.

Procedure:

Take a plant with destarched leaves. Insert one of its leaves in a conical flask containing potassium hydroxide.

After a few hours, test the particular leaf and some other leaf of the same plant for the presence of starch.

Observations:

The leaf which was inserted in the conical flask stains Brown, and the other leaf which is exposed to sunlight turns blue black.

Inference:

potassium Hydroxide in the flask absorbs carbon dioxide; Thus, due to the absence of carbon dioxide the leaves fails produce starts which proves that carbondioxide is necessary for photosynthesis