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An aquatic plant was placed in a test tu...

An aquatic plant was placed in a test tube containing water. The tube was then stopered and left outdoors for 24 hours. The pH value of water was measured at regular intervals. What must have been the result?

A

pH value was the lowest just before sunrise

B

pH value was the highest iust before sunrise

C

pH value was the lowest at noon

D

pH value was the lowest just before sunset

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The correct Answer is:
A
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