Question

Electrolysis of aqueous solution of potassium acetate gives an alkane (x) and \({CO}_2\) (y) at anode. The volume ratio of these two gases \(x\) and \(y\) at STP is respectively:

• A. 1 : 1
• B. 2 : 1
• C. 1 : 2
• D. 1 : 3

Hint:

Electrolysis of carboxylate ions leads to alkane and \({CO}_2\) in a 1:2 ratio by volume.

Answer 1

The Correct Option is C

During electrolysis of potassium acetate, the following reaction occurs:

- At anode: acetate ions oxidize to produce ethane (alkane) and carbon dioxide.
- The ratio of moles of alkane to \(\mathrm{CO}_2\) formed is 1:2.
- Hence, volume ratio at STP is also 1:2.