Discussion
The lead-silver system is a simple eutectic system, so its two components are
Answer: D
Correct answer: completely immiscible in the solid state
A simple eutectic diagram, with no solid solubility at either end, implies that the two metals reject one another entirely on freezing. This is what makes the Pattinson process work: cooling argentiferous lead deposits pure lead crystals, leaving the silver concentrated in the remaining melt.
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