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Match the column:...

Match the column:

A

`{:(Column I, ColumnII),(PbS rarr PbO,(p)"Roasting"):}`

B

`{:(Column I, ColumnII),(CaCO_(3) rarr CaO ,(q)"Calcination"):}`

C

`{:(Column I, ColumnII),(ZnS rarr Zn ,(r)"Carbon reduction"):}`

D

`{:(Column I, ColumnII),(Cu_(2)S rarr Cu ,(s)"Self reduction"):}`

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The correct Answer is:
A, B, C, D
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