Based on the equations below, which metal is the most active? Pb(NO3)2 (aq) + Ni (s) → Ni(NO2)2 (aq) + Pb (s), Pb(NO3)2 (aq) + Ag (s) → No reaction, Cu(NO3)2 (aq) + Ag (s) → No reaction?
Answer: Ni
Explanation
The metal that is most active is the one that can displace other metals from their salts. Based on the equations provided:
- Ni can displace Pb from Pb(NO3)2, so Ni is more active than Pb.
- Ni cannot displace Ag from AgNO3 (no reaction), so Ag is less active than Ni.
- Cu cannot displace Ag from AgNO3 (no reaction), so Ag is less active than Cu.
Therefore, the order of reactivity is: Ni > Pb > Cu > Ag
So, Ni is the most active metal among the options.
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