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Standard XII

Biology

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What chemical...

Question

What chemical do you use to remove CO2 from inside a flask in certain experiments on photosynthesis?

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Solution

KOH or potassium hydroxide is the chemical that is used to absorb CO2 from inside a flask in certain experiments on photosynthesis.

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Similar questions

A plant is kept in a dark cupboard for about 48 hours before conducting any experiment on photosynthesis in order to

(a) remove chlorophyll from the leaves.

(b) remove starch from the leaves.

(d) ensure that the leaves are free from starch.

Q. Which one of the following is the best reason for leaving a plant in a dark place before carrying out experiments on photosynthesis?
(a) To remove chlorophyll from the leaves.
(b) To increase the release of CO₂ by the leaves.
(c) To remove starch from the leaves.
(d) To stop synthesis process in the leaves.

Q. The figure given below represents an experiment to demonstrate a particular aspect of photosynthesis. The alphabet '

A

' represents a certain condition inside the flask.
(i) What is the aim of the experiment?
(ii) Identify the special condition inside the flask.
(iii) Name an alternative chemical that can be used instead of

K O H

.
(iv) In what manner do the leaves

1

and

2

differ at the end of the starch test?

The diagram given below represents an experiment performed to demonstrate a particular aspect of photosynthesis. The apparatus was kept in sunlight for the whole day. The numeral 1 represents a certain condition inside the flask and numeral 2 represents a chemical responsible for this condition.

Which of the following are True?
(a) The chemical substance numbered 2 is Potassium Hydroxide (KOH)
(b) The process which is reverse of photosynthesis in terms of the end-products is respiration.
(c) The special condition inside the flask is that the substance placed inside absorbs all the C $O_{2}$ and the leaf gets no C $O_{2}$ .

Q. Which substance is used to remove chlorophyll from a green leaf during photosynthesis experiments?

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Standard XII Biology

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