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Which compound is a nonelectrolyte?

  • A.C2H6O
  • B.HCl
  • C.Na2CO3
  • D.NaCl

Answer: A

\(\mathrm{C_2H_6O}\) - ethanol - is the non-electrolyte.

It dissolves in water as whole molecules, producing no ions, so the solution does not conduct. HCl ionises completely, and \(\mathrm{Na_2CO_3}\) and NaCl are ionic solids that dissociate on dissolving.

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