question_answer

Oxidation of succinate ion produces ethylene and carbon dioxide gases. On passing 0.2 Faraday electricity through an aqueous solution of potassium succinate, the total volume of gases (at both cathode and anode) at STP (1 atm and 273 K) is:

A) 8.96 L              

B) 4.48 L

C) 6.72 L                          

D) 2.24 L

Correct Answer: A

Solution :

[a] Total equivalent of \[{{C}_{2}}{{H}_{4}}+C{{O}_{2}}+{{H}_{2}}=0.2+0.2+0.2=0.6\] Total moles of gases \[=\frac{0.2}{2}+\frac{0.2}{1}+\frac{0.2}{2}=0.4\] \[\text{V=}\frac{nRT}{P}=\frac{0.4\times 0.0821\times 273}{1}=8.96L.\]