Why zinc is more reactive than copper?
ANS: Zinc is up the table of reactivity to copper.Metals always react by losing electrons (oxidation) they are then reducing agents. However if a metals is in competition with metal ions the more reactive metal can oblige the less reactive metal (in the form of ions) to accept electrons. This is called a displacement reaction.
Zinc reacts with a solution containing copper ions. The zinc metal is more reactive than copper metal and so it can force the copper metal ions to accept electrons and become metal atoms.
Zn(s) Zn2+(aq) + 2e
Cu2+(aq) + 2e Cu(s)
The zinc metal passes its electrons to the copper ions. We observe that the zinc develops a pink layer of coper on its surface and the blue copper ion solution fades in colour.
We say that the zinc displaces the copper ions from solution. Thus, it proves Zinc is more reactive than Copper.