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Question: Answered & Verified by Expert
An aqueous solution containing 1 M each of Au3+,Cu2+,Ag+,Li+ is being electrolysed by using inert electrodes. The value of standard potentials are
EAg+/Ago=0.80V,ECu+/Cuo=0.34V and EAu3+/Auo=1.50V,ELi+/Lio=-3.03V
with increasing voltage, the sequence of deposition of metals on the cathode will be
ChemistryElectrochemistryNEET
Options:
  • A Li, Cu, Ag, Au
  • B Cu, Ag, Au
  • C Au, Ag, Cu
  • D Au, Ag, Cu, Li
Solution:
2370 Upvotes Verified Answer
The correct answer is: Au, Ag, Cu
Only Au3+,Ag+ and Cu2+ will deposit at cathode. Li will not deposit at cathode because SRP of H2 is 0.00V, so after Cu2+ , H2 will evolve at cathode.

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