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Q.

Which of the following metal can deposit copper from copper sulphate solution

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a

Mercury

b

Platinum

c

Gold 

d

Iron

answer is B.

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Detailed Solution

  • Among given metals, only Fe is more reactive than Cu so it can replace Cu from solution. (Only Fe has less reduction potential than Cu.)
  • Cu++ will be reduced and Fe will be oxidized.
  • Cu+++Fe→Cu+Fe++.
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