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Doctors Medicines MCQs Q&A

  1. boiling point
  2. melting point
  3. freezing point
  4. triple point
  5. None of the above/More than one of the above
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1 Answers

Option 4 : triple point

The correct option is triple point.

CONCEPT:

  • The temperature and pressure at which the solid, liquid, and vapor phases of a pure substance coexists in equilibrium are called the triple point.​
  • The Triple point is a line on the P-V diagram where all the three phases solid, liquid, and gases exist in equilibrium.
  • The triple point is merely the point of intersection of the sublimation and vaporization curves.
  • It has been found that on a ‘p-T’ diagram the triple point is represented by a point and on a ‘p-v’ diagram it is a line, and on a ‘u-v’ diagram it is a triangle.
  • In the case of ordinary water, the triple point is at a pressure of 4.58 mm Hg and a temperature of 0.01°C.
  • The matter solidifies on the left side of the triple point, not at the triple point.
  • The matter liquifies on the upper side of the triple point, not at the triple point.
  • The matter sublimates on the right side of the triple point, not at the triple point.

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