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 Solution:**

1. **Understanding Conductivity**: Conductivity in a substance is primarily due to the presence of charged particles, known as ions, which can move freely and carry electric current.

2. **Anhydrous HCl**: Anhydrous HCl (hydrochloric acid without water) does not dissociate into ions. In its gaseous state, HCl molecules exist as neutral molecules and do not provide any charge carriers.

3. **Lack of Ionization**: Since anhydrous HCl does not ionize, there are no free ions available to conduct electricity. Therefore, it is classified as a bad conductor of electricity.

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