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Respiratory Balance Sheet

How does the ...

Question

How does the use of KOH help to show ${C O}_{2}$ is released during respiration in the germinating seed respiration experiment ?

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Solution

Potassium hydroxide is used in the experiment for the absorption of CO2 from the plant released during respiration. When KOH absorbs CO2, it creates a vacuum in the flask. The air present in the bent glass tube moves into the conical flask. This pulls the water in the bent tube further up.

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Why is limewater used in the experiment to prove that CO2 is produced during respiration in germinating seeds?

Q. In the experiment to show that CO₂ is given out during respiration by germinating seeds, the student uses :
(1) Lime water
(2) Alcohol
(3) KOH solution
(4) Iodine solution

Q. A student is not getting the result for his experimental setup to show that germinating seeds release

C O_{2}

during respiration. Give two logical reasons for this.

Q. In the experiment to show that

C O_{2}

is released during respiration', the small test tube of KOH solution is suspended inside the conical flask to absorb the :
(a) air of the flask
(b) moisture of the flask
(c)

O_{2}

of the flask
(d)

C O_{2}

of the flask released by the seeds

Q. How can you show experimentally that heat is liberated during respiration in germinating seeds?

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