Chemical Engineering Thermodynamics
Critical solution temperature (or the con-solute temperature) for partially miscible liquids (e.g., phenol-water) is the minimum temperature at which

Two liquids are completely separated into two layers
Mutual solubility of the two liquids shows a decreasing trend
A homogeneous solution (say of phenol water) is formed
None of these

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Chemical Engineering Thermodynamics
Pick out the wrong statement pertaining to the decomposition of PCl5 represented by, PCl5 ⇋ PCl3 + Cl₂.Degree of dissociation of PCl5 will

Decrease on increasing the pressure of the system
Increase on addition of an inert gas at constant pressure
None of these
Decrease on addition of Cl₂

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