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An aqueous solution containing 1 M each of A u 3 + , C u 2 + , A g + , L i + is being electrolyzed by using inert electrodes. The value of standard potentials are E A g + / A g ° = 0.80 V , E C u + / C u ° = 0.34 V , E A u 3 + / A u ° = 1.50 V , E L i + / L i ° = - 3.03 V With increasing voltage, the sequence of deposition of metals on the cathode will be

Options

  1. AL i , C u , A g , A u
  2. BC u , A g , A u
  3. CA u , A g , C u
  4. DA u , A g , C u , L i

Correct answer

C. A u , A g , C u

Step-by-step solution

The most unreactive metal that the ion which has the most positive reduction potential will be released to first. Further L i + has a very negative reduction potential hence it will not be released in aqueous medium.

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