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Matter in Our Surroundings — Science STD 9 — Question

CBSE BoardEnglish MediumSTD 9ScienceMatter in Our Surroundings1 Mark
MCQ
Which of the following statements is incorrect:
  • A
    Melting and freezing point of a substance are the same.
  • B
    Evaporation of liquid takes place only at its boiling point.
  • C
    Pure water has no taste.
  • D
    Water allows sunlight to pass through it.
✓

Answer

  1. Evaporation of liquid takes place only at its boiling point.

Explanation:

During evaporation, water does not convert into a gas or steam, but the random movement of molecules on the surface of the water provides some of the molecules with enough energy to escape from the surface into the air.

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