Which one of the following statements is correct ?
Iron sulphate and copper sulphate crystals have same number of water of crystallization
Iron sulphate and zinc sulphate crystals have same number of water of crystallization
Zinc sulphate and copper sulphate crystals have same number of water of crystallization
Iron sulphate, copper sulphate and zinc sulphate crystals each have same number of water of crystallization
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC CAPF – 2015
– 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.