In the metallurgy of zinc, the zinc dust obtained from roasting and reduction of zinc sulphide contains some ZnO. How is this removed [MP PET 1993; AFMC 2002]

Absorbance of ultraviolet light and re-emission of white light is employed

Shock cooling by contact with a shower of molten lead is done

In the metallurgy of zinc, the zinc dust obtained from roasting and re

1.	In the metallurgy of zinc, the zinc dust obtained from roasting and reduction of zinc sulphide contains some ZnO. How is this removed [MP PET 1993; AFMC 2002]
A.	Absorbance of ultraviolet light and re-emission of white light is employed
B.	Shock cooling by contact with a shower of molten lead is done
C.	X-ray method is used
D.	Smelting is employed
Answer» E.

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In the metallurgy of zinc, the zinc dust obtained from roasting and reduction of zinc sulphide contains some ZnO. How is this removed [MP PET 1993; AFMC 2002]

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