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Matter in Our Surroundings — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceMatter in Our Surroundings1 Mark
MCQ
Among the following, which one is the false statement?
  • ✓
    Sublimation is the process of conversion of a matter from its liquid state to gaseous state at specific conditions of temperature and pressure.
  • B
    Naphthalene, camphor, iodine, ammonium chloride are undergo sublimation.
  • C
    The melting point of ice is $0^\circ C $or $273.16\ K$
  • D
    Condensation is the process of conversion of matter from its gaseous state to liquid state at specific conditions of temperature and pressure.
✓

Answer

Correct option: A.
Sublimation is the process of conversion of a matter from its liquid state to gaseous state at specific conditions of temperature and pressure.

Sublimation is the process of transformation directly from the solid phase to the gaseous phase, without passing through an intermediate liquid phase. Also, at pressures below the triple point pressure, an increase in temperature will result in a solid being converted to gas without passing through the liquid region.

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