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AIIMS 2008
Exam
AIIMS
Year
2008
Subject
Chemistry
Chapter
Electrochemistry

AIIMS 2008 · Chemistry · Electrochemistry

Assertion : Copper metal gets readily corroded in acidic aqueous...

Assertion : Copper metal gets readily corroded in acidic aqueous solution. Reason : Free energy change for this process is negative.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion.
  2. BIf both 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

D. If both assertion and reason are false.

Step-by-step solution

Non-oxidising acids (HCl\left(\mathrm{HCl}\right. and dil. H2SO4)\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, ΔG\Delta G can not be −ve-\mathrm{ve}.
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