The elevation in boiling point be different if 0.1 mole of sodium chloride or 0.1 mole of sugar is dissolved in 1 L of water. Sugar is non electrolyte and it do not dissociate in aqueous solution. NaCl is a strong electrolyte and completely dissociates to give sodium ions and chloride ions. Hence, the number of particles produced by 0.1 mole of sodium chloride and 0.1 mole of sugar will be different. Hence, the elevation in boiling point be different