Question

A student used boiled seeds to perform the experiment CO₂ is released during respiration. His observations would be

• A. Water level in bent tube rises.
• B. Water level in bent tube decreases
• C. Water level in the bent tube remains the same.
• D. Rise in water level depends on the extent of the boiling the seeds.

Answer 1

The correct option is C

Water level in the bent tube remains the same.

The correct option is C.

Explanation of the correct option:

• In the experiment, boiled seeds do not respire, so there is no release of carbon dioxide, and so the water level in the tube remains the same.

Explanation of the incorrect options:

Option A:

• As seeds are not alive and boiled up, there is no rise in the water level in the tube.

Option B:

• The water level in the tube does not decrease, as the boiled seeds do not release carbon dioxide.

Option D:

• Little boiling will kill the seeds, so they will not release carbon dioxide.

Therefore, the water level in the bent tube does not change in the given experiment.