Question

Assertion: Dilute H${}_2$SO${}_4$ on electrolysis liberates O${}_2$ at the anode.
Reason: Hydroxide ions have lower discharge potential than sulphate ions.

• A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion
• B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
• C. Assertion is true but Reason is false
  
• D. Assertion is false but Reason is true
• E. Both Assertion and Reason are false

Answer 1

The correct option is A Both Assertion and Reason are true and Reason is the correct explanation of Assertion

Dilute H${}_2$SO${}_4$ on electrolysis liberates O${}_2$ at the anode. This is due to lower discharge potential of hydroxide ions than sulphate ions.
$4O{H}^{-}\to 2H_{2}O+O_2\uparrow +4e^{-}$