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GATE 2017
Medium
Which conditions are valid at the plait point (of a ternary LLE system)? P) density difference between extract/raffinate is zero, Q) interfacial tension between extract/raffinate is zero, R) composition difference between extract/raffinate is zero.
- AP and Q only
- BQ and R only
- CP and R only
- P, Q and R
Explanation
At the plait point, the extract and raffinate phases become identical — all their properties (density, composition) and the interfacial tension between them converge to zero difference.
Source: GATE CH 2017 (2017)
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