Multiple choice

Which of the following statements is/are incorrect? P. The refining of impure Sn involves Sweating process followed by Electrorefining. Q. Calcined mixture of dolomite and powder of ferro-silicon is heated to 1200 degree C in a closed container. Mg is vaporised and collected in a condenser. The process is called as Pidgeon process. R. Galena and Willemite are sulphide ores.

  1. Only P

  2. Only P and Q

  3. Only Q and R

  4. Only Pand R

  5. Only R

Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Galena (PbS) is the sulphide ore of lead. Willemite (ZnSiO3) is the silicate ore of zinc. Hence, statement R is only incorrect.

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