In the experiment to demonstrate that CO2 is given out during respiration, why is KOH placed in the small test-tube in the flask containing germinating seeds?
To provide oxygen required by the seeds for respiration.
To absorb carbon dioxide and create partial vacuum in the flask.
To absorb water from the seeds to make them dry.
To make the air present in the flask alkaline.
In the experiment to demonstrate that CO2 is given out during respiration, why is KOH placed in the small test-tube in the flask containing germinating seeds?
To provide oxygen required by the seeds for respiration.
To absorb carbon dioxide and create partial vacuum in the flask.
To absorb water from the seeds to make them dry.
To make the air present in the flask alkaline.
The correct option is B To absorb carbon dioxide and create partial vacuum in the flask.
The correct option is B.
Explanation for the Correct Option:
- The germinating seeds perform respiration by uptaking the oxygen to release the carbon dioxide gas.
- The potassium hydroxide (KOH) is placed in the test tube in a flask to absorb the carbon dioxide liberated from the germinating seeds present in the flask.
- It creates a partial vacuum, causing the solution level to rise in the flask.
Explanation for Incorrect Options:
Option A:
- Potassium hydroxide cannot provide oxygen to the germinating seeds. Instead, it interacts with the carbon dioxide to create a vacuum.
Option C:
- The potassium hydroxide absorbs carbon dioxide, not water.
Option D:
- The potassium hydroxide solution interacts with acidic carbon dioxide to create a vacuum in the flask. It does not make the air in the flask alkaline.
Therefore, in the experiment to demonstrate the release of CO2 during respiration, the potassium hydroxide (KOH) is placed in the small test tube in the flask containing germinating seeds to absorb the carbon dioxide released by the seeds that will produce a partial vacuum in the flask.
To absorb carbon dioxide and create partial vacuum in the flask.
The correct option is B.
Explanation for the Correct Option:
- The germinating seeds perform respiration by uptaking the oxygen to release the carbon dioxide gas.
- The potassium hydroxide (KOH) is placed in the test tube in a flask to absorb the carbon dioxide liberated from the germinating seeds present in the flask.
- It creates a partial vacuum, causing the solution level to rise in the flask.
Explanation for Incorrect Options:
Option A:
- Potassium hydroxide cannot provide oxygen to the germinating seeds. Instead, it interacts with the carbon dioxide to create a vacuum.
Option C:
- The potassium hydroxide absorbs carbon dioxide, not water.
Option D:
- The potassium hydroxide solution interacts with acidic carbon dioxide to create a vacuum in the flask. It does not make the air in the flask alkaline.
Therefore, in the experiment to demonstrate the release of CO2 during respiration, the potassium hydroxide (KOH) is placed in the small test tube in the flask containing germinating seeds to absorb the carbon dioxide released by the seeds that will produce a partial vacuum in the flask.
