ANS:A -

To represent a liquid-liquid extraction system involving three components, a ternary phase diagram is typically used. In the case of a system like water-benzene-acetic acid, where one pair is partly soluble, we need to consider the relative solubilities and interactions of the three components. In this system:

• Component A: Diluent (e.g., water)
• Component B: Solvent (e.g., benzene)
• Component C: Solute (e.g., acetic acid)

The ternary phase diagram would illustrate the composition and behavior of the three phases involved: the aqueous phase (rich in water), the organic phase (rich in benzene), and the interface (where extraction occurs). However, without a specific diagram provided, I can't directly point to the correct one. Ternary phase diagrams are highly specific to the system being studied and the conditions under which the extraction is performed. They depict regions of two-phase and three-phase equilibrium as well as the composition of the phases in equilibrium. If you have a specific ternary diagram in mind or need assistance interpreting one, please provide more details, and I'll be happy to help further!