In the experiment shown in the diagram, water level rises in the bent tube, because

Germinating seeds consume all Oxygen and Carbon-dioxide.

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Germinating seeds consume all Oxygen and give out Carbon dioxide which is absorbed by potassium hydroxide.

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Carbon dioxide is given out by germinating seeds

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Seeds need water for germination.

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Solution

The correct option is B
Germinating seeds consume all Oxygen and give out Carbon dioxide which is absorbed by potassium hydroxide.

The $C O_{2}$ produced during cellular respiration will be removed by potassium hydroxide (KOH) and will form a solid potassium carbonate $(K_{2} C O_{3})$ when the following reaction occurs:
$C O_{2} + 2 K O H \to K_{2} C O_{3} + H_{2} O$
Since the $C O_{2}$ is removed, the change in the volume of gas in the respirometer will be directly related to the amount of oxygen consumed. If the temperature and volume of water stay constant then the water will move towards the region of lower pressure. During respiration, oxygen will be consumed and its volume will be reduced because the $C O_{2}$ is being converted to a solid. The net result is a decrease in gas volume in the tube and a decrease in pressure of the tube.

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Similar questions

An experimental setup showed that carbon dioxide is produced by a seed on germination. This carbon dioxide turned the limewater milky. Which process in germinating seeds is responsible for carbon dioxide generation.

Q. What happens to carbon dioxide that is given out by germinating seeds while performing the respiration experiment?

Q. An experimental set-up to demonstrate respiration in germinating seeds is shown here. It is observed that water from the beaker has not risen into the delivery tube (bent tube). This is because :

(1) the set-up is airtight
(2) the beaker has coloured water
(3) carbon dioxide is not being absorbed
(4) no oxygen is available to seeds for respiration

Q. Why is some KOH placed in a small test tube in the flask with germinating seeds in the experiment to demonstrate occurrence of respiration in germinating seeds?
(1) To provide oxygen required by the seeds for respiration.
(2) To absorb carbon dioxide and create partial vacuum in the flask.
(3) To absorb water from the seeds to make them dry.
(4) To make the air present in the flask alkaline.

Q. Germinating seeds generate carbon dioxide by the process of .

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