1.

Copper is the most noble of the first row transition metals and occurs in small deposits in several countries. Ores of copper include chalcanthite (CuSO_(4).5H_(2)O) atacamite (Cu_(2)Cl(OH)_(3)),Cuprite (Cu_(2)O) , copper glance (Cu_(2)S) and malachite (Cu_(2)(OH)_(2)CO_(3)). however 80% of the world copper productioncomes from the ore chalcopyrite (CuFeS_2). the extraction of copper from chalcopyrite invovles partial roasting . removal of iron and self-reduction. IF the 0.05 molar solution of M^(+) is replaced by a 0.0025 molar M^(+) solution. then the magnitude of the cell potential would be

Answer»

35 mV
70 mV
140 mV
700 mV

Answer :C


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