Match the equilibrium processes in List-I with their respective physical properties in List-II and choose the

Question

Match the equilibrium processes in List-I with their respective physical properties in List-II and choose the correct option:

**List-I (Equilibrium Process)**
A. $	ext{Liquid} ightleftharpoons 	ext{Vapour}$
B. $	ext{Solid} ightleftharpoons 	ext{Liquid}$
C. $	ext{Solid} ightleftharpoons 	ext{Vapour}$
D. $	ext{Solute (solid)} ightleftharpoons 	ext{Solute (solution)}$

**List-II (Physical Properties)**
I. Melting point
II. Boiling point
III. Sublimation point
IV. Saturated solution
V. Unsaturated solution

Accepted Answer

Based on the characteristics of physical equilibria:

*   **A. $	ext{Liquid} ightleftharpoons 	ext{Vapour}$:** For any pure liquid at one atmospheric pressure, the temperature at which the liquid and its vapours are at equilibrium is called the boiling point .
*   **B. $	ext{Solid} ightleftharpoons 	ext{Liquid}$:** For any pure substance at atmospheric pressure, the temperature at which the solid and liquid phases are at equilibrium is called the melting point .
*   **C. $	ext{Solid} ightleftharpoons 	ext{Vapour}$:** The equilibrium between a solid and its vapour phase represents sublimation .
*   **D. $	ext{Solute (solid)} ightleftharpoons 	ext{Solute (solution)}$:** In a saturated solution, a dynamic equilibrium exists between the solute molecules in the solid state (undissolved) and in the solution .

Therefore, the correct matching is A-II, B-I, C-III, D-IV.

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