Final answer:
C) Sucrose (C12H22O11) is a non-electrolyte because it dissolves in water without producing ions, whereas the other substances listed dissociate into ions, making them electrolytes.
Step-by-step explanation:
Among the substances listed, which are sodium chloride (NaCl), hydrochloric acid (HCl), sucrose (C12H22O11), and potassium hydroxide (KOH), sucrose is the compound that is a non-electrolyte.
A non-electrolyte is a substance that, when dissolved in water, does not produce ions and therefore does not conduct electricity. Sucrose, which is common table sugar, dissolves in water as neutral molecules and does not dissociate into ions.
In contrast, NaCl, HCl, and KOH all dissociate into ions when dissolved in water, making them electrolytes. Sodium chloride and potassium hydroxide are considered strong electrolytes as they dissociate completely, whereas hydrochloric acid is a strong acid and hence also a strong electrolyte.
A non-electrolyte is a compound that does not conduct an electric current in either aqueous solution or in the molten state. Many molecular compounds, such as sugar or ethanol, are nonelectrolytes. When these compounds dissolve in water, they do not produce ions.
Out of the given options, sucrose (C₁₂H₂₂O₁₁) is a non-electrolyte. Sucrose is a molecular compound that does not dissociate into ions when dissolved in water.