Question:
The MISMATCH among the following phase transition processes is
The MISMATCH among the following phase transition processes is
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Logic Tip: The prefix "re-" in regelation means "again," referring to the specific cycle of melting and freezing \textit{again} due to pressure changes (commonly seen in ice skating or glacier movement). It has nothing to do with vapours.
Updated On: Apr 27, 2026
- Solid to liquid: melting
- Liquid to solid: freezing
- Liquid to vapour: vaporisation
- Solid to vapour: sublimation
- Vapour to solid: regelation
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The Correct Option is
Solution and Explanation
Concept:
Phase transitions represent the physical change of a substance from one state of matter to another. Each specific transition has a standard scientific term. Let's verify each option:
Step 1: Evaluate the mismatched term.
Option E states "Vapour to solid: regelation". The direct transition from a gas (vapour) to a solid, bypassing the liquid phase, is properly known as deposition (or desublimation).
Step 2: Define regelation.
Regelation is the phenomenon where a substance (like ice) melts under applied pressure and then refreezes when the pressure is reduced. It is not the term for a vapour-to-solid transition. Therefore, Option E is the mismatch.
Phase transitions represent the physical change of a substance from one state of matter to another. Each specific transition has a standard scientific term. Let's verify each option:
- Solid to liquid is melting (or fusion).
- Liquid to solid is freezing (or solidification).
- Liquid to vapour is vaporisation (or boiling/evaporation).
- Solid to vapour is sublimation.
Step 1: Evaluate the mismatched term.
Option E states "Vapour to solid: regelation". The direct transition from a gas (vapour) to a solid, bypassing the liquid phase, is properly known as deposition (or desublimation).
Step 2: Define regelation.
Regelation is the phenomenon where a substance (like ice) melts under applied pressure and then refreezes when the pressure is reduced. It is not the term for a vapour-to-solid transition. Therefore, Option E is the mismatch.
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