Metallurgy: Occurence, Extraction and Applications o...

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Multiple Choice

Which of the following statements is/are true?
P. The silicon carbide is used as a refractory material.
Q. Blast furnace is used for the smelting of lead ore.
R. Calamine and casseterite are the ores of zinc.

  1. P only
  2. Q only
  3. R only
  4. P and Q
  5. Q and R
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