Question

what happens to the surface tension of water when phenol is added​

Answer 1

In case the solute is very easily soluble, then the surface tension of liquid increases. For example, by adding soap or phenol in water, its surface tension decreases.

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Answer 2

Explanation:

In case the solute is very easily soluble, then the surface tension of liquid increases. ... For example, by adding soap or phenol in water, its surface tension decreases.