label anode and rank the rest

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shsh

Science

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Explanation & Answer

Al  have highest reduction( in negative)  potential among  them so it will be easily oxidize so 

  therefore 

anode will be Al 

  for  suitable  cathode  means  reduction potential ( in negative)  should be minimum . 

 Al<Mn<Zn<Ni<Cu

for reference you can check electrochemical   series  


I hope it will be helpful for you 


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