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( Zn (s) + Cu^ 2+ (aq) longrightarrow Zn^ 2+ (aq) + Cu (s); ) যদি ( E^ circ _ Zn^ 2+ /Zn = -0.76 V ) এবং ( E^ circ _ Cu^ 2+ /Cu = +0.34 V ) হয় তবে ( E^ circ _ cell = ? ) | Suva Ai