1.

Which of the following processes involves smelting process ?

Answer»

`ZnCO_3 rarr ZnO +CO_2`
`Fe_2O_3 +3CO rarr 2Fe+3CO`-2
`2PbS+3O_2 rarr 2PbO +2O_2`
`Al_2 O_3 .2H_2O rarr Al_2O_3 + 2H_2O`

ANSWER :B


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