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

Critical solution temperature (or the con-solute temperature) for partially miscible liquids (e.g., phenol-water) is the minimum temperature at which Correct Answer A homogeneous solution (say of phenol water) is formed

Critical solution temperature is that temperature at which the complete miscibility or a homogeneous mixture is formed. Sometimes the temperature has to be raised from the existing temperature or sometimes it should be decreased from the existing temperature to reach this critical solution temperature.
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