A. NaCl (salt) because it is an ionic compound which will dissociate in water and make the water conduct electricity
Explanation:
Sodium chloride (NaCl) is an ionic compound and when is dissolved in water sodium (Na⁺) and chlorine (Cl⁻) ions are formed. The ions in water will promote the movement of electrical charges so the solution will conduct electricity.
Sugar (C₆H₁₂O₆) is a covalent compound and will not form ions when is dissolved in water. The sugar solution will not conduct electricity.
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conduction of electricity by ions
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