What do you understand by the following terms?
Acid radical

Explanation

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

1. **Definition of Acid Radical:**
An acid radical is defined as a negatively charged radical. This means that it carries a negative charge due to the presence of extra electrons.

2. **Characteristics of Radicals:**
A radical is a chemical species that has at least one unpaired valence electron. This unpaired electron makes the radical highly reactive.

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