Which one of the following salts does <strong>NOT</strong> possess water of crystallization?
- A. Potassium permanganate ✓
- B. Blue vitriol
- C. Washing soda
- D. Mohr's salt
Correct Answer: A. Potassium permanganate
Explanation
Potassium permanganate (KMnO_4) is anhydrous and does not contain water of crystallization. Blue vitriol, washing soda, and Mohr's salt all contain molecules of water of crystallization.
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