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Question

Liquid hydrogen chloride is unable to conduct electricity, but molten sodium chloride is able to conduct electricity — explain

WBBSE Class X Physical Science Ionic and Covalent Bond 02 Mark 2026

Answer

Liquid hydrogen chloride (HCl) is a covalent compound and does not contain free ions in the liquid state. Therefore, it cannot conduct electricity.

On the other hand, molten sodium chloride (NaCl) contains freely moving Na⁺ and Cl⁻ ions. These ions carry electric charge through the molten salt. Therefore, molten NaCl conducts electricity.

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