IIT-JEE Exam

In self–reduction, the reducing species is
(A) S (B) O2−
(C) S2− (D) SO2

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IIT-JEE Other Question

Iron is removed from chalcopyrite as
(A) FeO (B) FeS
(C) Fe2O3 (D) FeSiO3 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
(A) 35 mV (B) 70 mV
(C) 140 mV (D) 700 mV