Crystals of hydrated salts contain a definite number of water molecules incorporated within their crystal structure. This water is called water of crystallization. - Iron(II) sulphate (Ferrous sulphate) commonly crystallizes as the heptahydrate, FeSO4.7H2O. - Copper(II) sulphate commonly crystallizes as the pentahydrate, CuSO4.5H2O. - Zinc sulphate commonly crystallizes as the heptahydrate, ZnSO4.7H2O.Comparing the number of water molecules: - Iron sulphate (7) and Copper sulphate (5): Different number. - Iron sulphate (7) and Zinc sulphate (7): Same number. - Zinc sulphate (7) and Copper sulphate (5): Different number. - Iron sulphate (7), Copper sulphate (5), and Zinc sulphate (7): Not all have the same number.
Which one of the following statements is correct ?
Asked in UPSC CAPF 2015 · UPSC CAPF 2016 · Topic: Inorganic Chemistry (Chemistry of Main Group Elements (s-block and p-block))
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Answer: B. Iron sulphate and zinc sulphate crystals have same number of water of crystallization
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