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Question
Shashank was asked to carry out an experiment to show that CO2 is given out during respiration. He constructed the set-up and observed that lime water in the beaker did not tum milky. The reason for the lime water not turning milky was
it was freshly prepared.
germinating seeds were used.
KOH solution was placed in the conical flask.
germinating seeds did not release CO2
Shashank was asked to carry out an experiment to show that CO2 is given out during respiration. He constructed the set-up and observed that lime water in the beaker did not tum milky. The reason for the lime water not turning milky was
it was freshly prepared.
germinating seeds were used.
KOH solution was placed in the conical flask.
germinating seeds did not release CO2
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Solution
The correct option is C KOH solution was placed in the conical flask.
The correct option is C.
Explanation of correct options:
- In the experimental setup, germinating seeds release carbon dioxide, which could have mixed with lime water attached to the conical flask. However, the presence of KOH (potassium hydroxide) solution inside the conical flask absorbed carbon dioxide because KOH is a strong base, and on the other hand, carbon dioxide is acidic.
- No mixing of carbon dioxide and lime water didn't let the latter turn milky.
Explanation of the incorrect options:
Option A:
- A freshly prepared solution is made instantly before the start of the experiment.
Option B:
- Germinating seeds are the ones that are in the process of becoming a plant.
Option C:
- Seeds release carbon dioxide during the process of germination.
Therefore, the presence of KOH solution in the flask prevents the lime water from turning milky.
KOH solution was placed in the conical flask.
The correct option is C.
Explanation of correct options:
- In the experimental setup, germinating seeds release carbon dioxide, which could have mixed with lime water attached to the conical flask. However, the presence of KOH (potassium hydroxide) solution inside the conical flask absorbed carbon dioxide because KOH is a strong base, and on the other hand, carbon dioxide is acidic.
- No mixing of carbon dioxide and lime water didn't let the latter turn milky.
Explanation of the incorrect options:
Option A:
- A freshly prepared solution is made instantly before the start of the experiment.
Option B:
- Germinating seeds are the ones that are in the process of becoming a plant.
Option C:
- Seeds release carbon dioxide during the process of germination.
Therefore, the presence of KOH solution in the flask prevents the lime water from turning milky.
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