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A student made the following observations in the laboratory. I. Clean copper metal did not react with 1molar P b N O 3 2 solution II. Clean lead metal dissolved in a 1 molar A g N O 3 solution and crystals of A g metal appeared III. Clean silver metal did not react with 1 molar C u N O 3 2 solution The order of decrease in reducing character of three metals is

Options

  1. AP b , C u , A g
  2. BP b , A g , C u
  3. CC u , A g , P b
  4. DC u , P b , A g

Correct answer

A. P b , C u , A g

Step-by-step solution

Metal placed above in electrochemical series replaces the other from its salt solution which is lower in the series. The low E o value containing metals have the high reducing character. Thus, order of reducing character of three metals is P b > C u > A g

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