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Question: Answered & Verified by Expert
Assertion : Copper metal gets readily corroded in acidic aqueous solution.
Reason : Free energy change for this process is negative.
ChemistryElectrochemistryAIIMSAIIMS 2008
Options:
  • A If both assertion and reason are true and reason is the correct explanation of assertion.
  • B If both assertion and reason are true but reason is not the correct explanation of assertion.
  • C If assertion is true but reason is false.
  • D If both assertion and reason are false.
Solution:
2113 Upvotes Verified Answer
The correct answer is: If both assertion and reason are false.
Non-oxidising acids $\left(\mathrm{HCl}\right.$ and dil. $\left.\mathrm{H}_2 \mathrm{SO}_4\right)$ do not have any effect on copper. However they dissolve the metal in presence of air. As it is a nonspontaneous process so, $\Delta G$ can not be $-\mathrm{ve}$.

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