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Matter in Our Surroundings — Science STD 9 — Question

CBSE BoardEnglish MediumSTD 9ScienceMatter in Our Surroundings1 Mark
MCQ
While putting clothes for drying up, why do we spread them out:
  • A
    Surface area is directly proportional to rate of evaporation.
  • B
    Increase in surface area decreases rate of evaporation.
  • C
    Increase in surface area increases rate of evaporation.
  • D
    Both A and C.
✓

Answer

  1. Both A and C.

Explanation:

Evaporation is a surface phenomenon. If the surface area is increased, the rate of evaporation increases.

While putting clothes for drying up, we spread them out, because, more area is exposed to sun and wind which speeds up the rate of evaporation.

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