Which reaction could be used to generate electricity in a voltaic electrochemical cell? which reaction could be used to generate electricity in a voltaic electrochemical cell? zn2+(aq)+sn(s)→sn2+(aq)+zn(s) cu2+(aq)+zn(s)→zn2+(aq)+cu(s) nacl(aq)+agno3(aq)→agcl(s)+nano3(aq ) none of the above?

The correct option is B.
A voltaic cell is an electrochemical cell which utilizes chemical reactions to produce electrical energy. The voltaic cell is usually made up of an anode, a cathode, an external circuit and a salt bridge. The  many chemical compounds that can be used for electricity generation in the voltaic cell. The overall chemical equation for the reaction between zinc and copper is as follows:
Zn + Cu2+ = Zn2+ + Cu.