Machine-translated by Google. Questions are authored in English.
Top

Discussion

Pattinson's process for desilverising lead exploits the fact that cooling an argentiferous melt first deposits

  • A.pure lead, enriching the melt in silver
  • B.pure silver, enriching the melt in lead
  • C.the eutectic mixture of both metals
  • D.an intermetallic compound of the two

Answer: A

Ore poor in silver lies on the lead side of the eutectic, so lead crystallises out and is skimmed away while the remaining liquid moves toward the eutectic composition. Repeating the operation concentrates the silver considerably.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.