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NEET2015ChemistryElectrochemistryActual

Assertion : Zinc displaces copper from copper sulphate solution. Reason : The E_ 298 ~K ^ of Zn is -0.76 ~V and that of Cu is +0.34 ~V .

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion.
  2. BIfboth assertion and reason are true but reason is not the correct explanation of assertion.
  3. CIf assertion is true but reason is false.
  4. DIf both assertion and reason are false.

Correct answer

A. If both assertion and reason are true and reason is the correct explanation of assertion.

Step-by-step solution

aligned & : Zn _ (s) + Cu _ (a q) ²⁺ Zn _ (a q) ²⁺+ Cu _ (s) & E_ Cu ²⁺ / Cu ^ o =0.34 ~V , E_ Zn ²⁺ / Zn =-0.76 ~V aligned Higher reduction potential of Cu ²⁺ ion than Zn ²⁺ ion shows that Cu ²⁺ ion has more tendency to undergo reduction.

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