Q1: A plait point is the point on the solubility curve, where the tie line reduces to a point. What is the number of plait point for a ternery system containing twopairs of partially miscible liquids ?

ANS:A - 0

A plait point is the point on the solubility curve where the tie line reduces to a point. In a ternary system containing two pairs of partially miscible liquids, the number of plait points is 1. Explanation:

1. Ternary System:
   • A ternary system consists of three components.
   • In a ternary phase diagram, there can be regions where two pairs of components are partially miscible with each other, resulting in a complex solubility behavior.
2. Plait Point:
   • A plait point occurs when two phases of a ternary system are in equilibrium and the tie line connecting them reduces to a single point on the solubility curve.
   • At this point, the composition of the two coexisting phases is identical.
3. Number of Plait Points:
   • In a ternary system containing two pairs of partially miscible liquids, there can be one plait point where the tie line reduces to a point on the solubility curve.
   • This occurs when the compositions of the coexisting phases are such that they coincide at a single point on the solubility curve.