AIIMS 2008 Chemistry Corrosion Assertion Reason Question
Assertion: Copper metal gets readily corroded in acidic aqueous solution. Reason: Free energy change for this process is negative.
Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
Assertion is true but Reason is false.
Both Assertion and Reason are false.
Correct Answer
Detailed Explanation
Non-oxidising acids (HCl and dil. H2SO4) do not have any effect on copper. However they dissolve the metal in presence of air. As it is a non-spontaneous process so, ΔG can not be –ve.
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