Given reasons in one or two sentences.
“Anhydrous HCl is a bad conductor of electricity but aqueous HCl is a good conductor.”

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Anhydrous HCl**: Anhydrous HCl is a gaseous form of hydrochloric acid that exists as a covalent molecule. In this state, the hydrogen (H) and chlorine (Cl) atoms are bonded together, and there are no free ions available to conduct electricity.

2. **Conductivity in Anhydrous HCl**: Since anhydrous HCl does not dissociate into ions, it lacks the charged particles necessary for electrical conductivity. Therefore, it is classified as a bad conductor of electricity.

3. **Understanding Aqueous HCl**: When HCl is dissolved in water (aqueous HCl), it dissociates into its constituent ions: hydrogen ions (H⁺) and chloride ions (Cl⁻). This process occurs because water is a polar solvent that stabilizes the ions.

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