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(Zn left(s right)+Cu^ 2+ left(aq right) to Zn^ 2+ left(aq right)+Cu left(s right) left[E=+1.1V right] ) কোষটিতে (E_ Zn/Zn^ 2+ ^o=0.76V )হলে i. (E_ Cu/Cu^ 2+ ^o=+0.43V ) ii. Zn দন্ড | Suva Ai