Which one of the following statements is not correct?

• A

  The magnitude of the surface tension of a liquid depends on the attractive forces of the molecules.
• B

  The surface tension decreases as the temperature is raised.
• C

  Liquids tend to rise in the capillary because of surface tension.
• Correct answer
  D

  On flat surface, liquid droplets are perfectly spherical.

Hence, the correct answer is option: 'D'.