Multiple choice

The surface tension of water ______ when the temperature is increased

  1. increases

  2. does not change

  3. decreases

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Surface tension decreases when temperature increases because cohesive forces decrease with an increase of molecular thermal activity. The influence of the surrounding environment is due to the adhesive action liquid molecules have at the interface.

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