A) \[MgS{{O}_{4}}.\,7{{H}_{2}}O\]
B) \[CuS{{O}_{4}}.5{{H}_{2}}O\]
C) \[FeS{{O}_{4}}.7{{H}_{2}}O\]
D) \[CaS{{O}_{4}}.\,2{{H}_{2}}O\]
Correct Answer: B
Solution :
\[CuS{{O}_{4}}.\,5{{H}_{2}}O\] is known as blue vitriol. It contains electrovalent, covalent, coordinate and H-bonding. It is square planar and paramagnetic in nature. Anhydrous \[CuS{{O}_{4}}\] is used for detection of water. White anhydrous \[CuS{{O}_{4}}\] turns blue in contact with water due to crystallization. It is used as fungicide and in the manufacture of artificial silk. Note - \[FeS{{O}_{4}}\,.\,7{{H}_{2}}O\] is known as green vitriol. \[MgS{{O}_{4}}\,.\,7{{H}_{2}}O\] is known as epsomite (Epsom salt) \[CaS{{O}_{4}}\,.\,\,2{{H}_{2}}O\] is known as gypsum salt.
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