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JEE Main 2016 Chemistry question

ChemistryElectrochemistryJEE Main 2016

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

Answer: (1)

Solution

At the **anode**, Kolbe electrolysis of the succinate dianion gives

^-OOC-CH_2-CH_2-COO^- → CH_2=CH_2 + 2CO_2 + ,

so 2 faradays liberate 1 mol of ethylene and 2 mol of carbon dioxide — 3 mol of gas in all. With F this

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Question ID VK-115628