Which one of the following salts does not possess water of crystallization?
[amp_mcq option1=”Potassium permanganate” option2=”Blue vitriol” option3=”Washing soda” option4=”Mohr’s salt” correct=”option1″]
This question was previously asked in
UPSC NDA-2 – 2022
Salts that do not possess water of crystallization are called anhydrous salts. Among the given options, Potassium permanganate (KMnO₄) is typically an anhydrous salt. Blue vitriol (CuSO₄·5H₂O), Washing soda (Na₂CO₃·10H₂O), and Mohr’s salt ((NH₄)₂Fe(SO₄)₂·6H₂O) are common examples of hydrated salts, meaning they contain a fixed number of water molecules (water of crystallization) associated with their crystal structure.