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Matter in Our Surroundings — Science STD 9 — Question

CBSE BoardEnglish MediumSTD 9ScienceMatter in Our Surroundings1 Mark
MCQ
Choose the correct statement of the following:
  • A
    Conversion of solid into vapours without passing through the liquid state is called vapourisation.
  • B
    Conversion of vapours into solid without passing through the liquid state is called sublimation.
  • C
    Conversion of vapours into solid without passing through the liquid state is called freezing.
  • D
    Conversion of solid into liquid is called sublimation.
✓

Answer

  1. Conversion of vapours into solid without passing through the liquid state is called sublimation.

Explanation:

Deposition is the phase transition in which gas transforms into solid without passing through the liquid phase. Deposition is a thermodynamic process. The reverse of deposition is sublimation and hence sometimes deposition is called desublimation.

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