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In the metallurgy of zinc , the zinc dus...

In the metallurgy of zinc , the zinc dust obtained from roasting and reduction of zinc sulphide contained some ZnO. It is removed by :

A

Absorbance of ultraviolet light and remission of white light

B

Shock cooling by contact with a shower of molten lead

C

X-ray method

D

Smelting

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The correct Answer is:
B
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