Question

Which compound is an electrolyte?
(1) butene (3) dimethyl ether
(2) propane (4) methanoic acid

Answer 1

Your answer is (4) methanoic acid, more commonly known as the formic acid. It is a weak electrolyte that dissolves into H^+  and COOH^-

Answer 2

The compound that is an electrolyte is Methanoic acid. Because it ionizes in water, which makes it an electrolyte.