WAEC Chemistry 2016 Paper

Concept:A non-electrolyte does not produce ions in solution, so it cannot conduct electricity.Explanation:$\mathrm{H}_2\mathrm{SO}_4$ dissociates into $\mathrm{H}^+$ and $\mathrm{SO}_4^{2-}$ ions, so it is an electrolyte.$\mathrm{CH}_3\mathrm{COOH}$ is a weak acid and ionises only partially, so it is a weak electrolyte.$\mathrm{NH}_4\mathrm{Cl}$ dissolves to form $\mathrm{NH}_4^+$ and $\mathrm{Cl}^-$ ions, so it is an electrolyte.$\mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6$ (glucose) is a covalent compound. It dissolves in water without forming ions, so it is a non-electrolyte.Answer:C. $\mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6$