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Water of crystallisation is found in which substance?

Answer and explanation

Correct answer: Copper sulphate crystals

Water of crystallisation is the fixed number of water molecules chemically associated with the ions in a salt crystal. Blue vitriol, or hydrated copper sulphate, has the formula CuSO₄·5H₂O and is a standard example. On heating, it loses this water and becomes white anhydrous CuSO₄; adding water restores the blue hydrated form. Dry sand, coal, and petrol are not crystalline hydrated salts, so option A is correct.

Related tags

Water Of CrystallisationCopper SulphateHydrated SaltAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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