Home PYQs UPPSC UPPSC MCQs Prelims 2005 (GS Paper I)

Question

The rain-drops are spherical because:

  1. they fall from big height
  2. the air has resistance
  3. the water has surface tension
  4. none of the above

Answer:

Option C: the water has surface tension

Detailed Solution:

The correct answer is “the water has surface tension”.

The raindrops are spherical primarily due to (3) the water's surface tension. Surface tension causes water molecules to be attracted to each other, resulting in the spherical shape of small droplets.