Why is some KOH is placed in a small test-tube in the flask with the germinating seeds in the experiment to demonstrate occurrence of respiration in germinating seeds?

KOH is placed in the small tube to absorb carbon dioxide and create a partial vacuum in the flask. This absorption of CO2 by KOH creates a partial vacuum in the flask resulting in an increase in the water level in the bent tube. Hence, the correct answer is option 2.

Why are KOH pellets kept in the boiling tube of pipette manometer?

This is because. (i) Oxygen of air in the flask will be taken up by germinating seeds. (ii) CO2​ given out by the germinating seeds is absorbed by the KOH. (iv) Moisture in the germinating seeds will reach the water in the beaker through the delivery tube.

Why is potassium hydroxide taken in test-tube A?

(a) To check the presence of carbon dioxide, potassium hydroxide is placed in the test tubes X and Y. Potassium hydroxide has a special property of absorbing carbon dioxide if produced. (b) In the test tube X, when the process of respiration takes place, the oxygen is consumed that is present in the test tube.

Why a dish of KOH is kept?

KOH is kept in tight conical flask because when it is kept open in the atmosphere it will immediately reacts with atmosphereric carbon-dioxide and form potassium carbonate .

Why is KOH placed?

because KOH absorbs carbon dioxide from the flask due to which vacuum is created as a result of which water level in the U shaped tube rises which tells the rate of respiration. And therefore experiment is conducted properly.

Why we add KOH in the bottle in the experiment to demonstrate that carbon dioxide is required for photosynthesis?

Answer: We add potassium hydroxide (KOH) in the bottle in the experiment to demonstrate that carbon dioxide is required for photosynthesis as it absorbs carbon dioxide from the bottle and there is no carbon dioxide left in the bottle.

Why is some KOH placed in a small test tube in the flask with plant materials in the experiment to demonstrate occurrence of respiration in plant materials?

because KOH absorbs carbon dioxide from the flask due to which vacuum is created as a result of which water level in the U shaped tube rises which tells the rate of respiration.

Why do you keep KOH pellets in the glass jar?

The germinating seeds in the conical flask release CO2 during respiration, which is absorbed by the KOH solution kept in the small test tube. This creates a partial vacuum in the flask that forces the water up the delivery tube. Thus, it proves that germinating seeds produce carbon dioxide during respiration.

What is the function of KOH taken inside the flask?

When water level rises in the tube, it indicates that carbon dioxide is produced by germinating seeds.So, the role of KOH here is that it absorbs the carbon dioxide gas which creates a vacuum in conical flask and finally pulls the water in the bent tube which proves respiration in plants.

What is the role of KOH in the experiment of release of CO2 in respiration?

Answer: KOH solution absorbs the CO2 released during respiration of seeds, which creates a partial vacuum in the conical flask, causing the rise in the water level of the U-shaped delivery tube. Rise in the level of water shows that CO2 is released during respiration.

Why do we hang KOH in the flask *?

What is the role of potassium hydroxide which is kept in the bell jar A to absorb oxygen B to absorb CO2 C to absorb sunlight D to absorb moisture?

Explanation: Potassium hydroxide absorbs CO2 which is present inside the bell jar.

Why is the KOH solution kept in the test tube?

Why is the KOH solution kept in the test tube inside the air-tight conical flask while doing the experiment of respiration of seed? Tools for everyone who codes. This experiment is conducted to show that seeds respire out carbon dioxide . So, inside the air tight container KOH solñ is kept as Potassium Hydroxide absorbs Carbon dioxide .

What is the role of Koh in germination experiment?

This indicates that the germinating seeds are actively respiring and CO2 gas is evolving in the process of germination. KOH solution kept in the test-tube inside the air-tight conical flask absorbs the evolved carbon dioxide released by germinating seeds; thereby creating a partial vacuum in the conical flask.

What happens when KOH is added to a flask?

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. Why do we use KOH solution and germinating seeds in an experiment?

How do you test for germination in a conical flask?

Tie a cotton thread around the neck of the test tube. Suspend the test tube in the conical flask above the germinating seeds. Close the mouth of the conical flask with a cork. Insert one end of a delivery tube into the conical flask through the cork and dip the other in a beaker containing water.