The diagram shows a respirometer.
What solution should be in the bottom of each tube and in which direction will the manometer fluid move?
| Solution placed in the bottom of each tube | Direction of movement of fluid in the manometer | |
|---|---|---|
| A. | acid | up on the left side |
| B. | alkali | down on the right side |
| C. | acid | up on the right side |
| D. | alkali | down on the left side |
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