question_answer

An ore on heating in air produces sulphur dioxide. The process which is used for its concentration and the two steps involved in the conversion of this ore into related metal are respectively

A)  Hydraulic washing, chemical separation and refining.

B)  Baeyer's process, electrorefining and reduction

C)  Froth floatation process, conversion to metal oxide and reduction of metal oxide

D)  None of these.