2015 · Q88
Which one of the following statements is correct?
general-sciencechemistry
- AIron sulphate and copper sulphate crystals have same number of water of crystallization
- BIron sulphate and zinc sulphate crystals have same number of water of crystallization
- CZinc sulphate and copper sulphate crystals have same number of water of crystallization
- DIron sulphate, copper sulphate and zinc sulphate crystals each have same number of water of crystallization
Explanation
Ferrous sulphate crystallizes as FeSO4.7H2O and zinc sulphate as ZnSO4.7H2O, so both have seven molecules of water of crystallization. Copper sulphate crystallizes as CuSO4.5H2O with only five. Hence iron sulphate and zinc sulphate crystals have the same number of water of crystallization.