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Question

Aqueous copper sulphate solution (blue in colour) gives:
(a) a green precipitate with aqueous potassium fluoride, and
(b) a bright green solution with aqueous potassium chloride.

Then, the molecular formula of the given copper sulphate compound is:

A
[Cu(H2O)3(CN)]SO4H2O
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B
[Cu(H2O)3SO4]H2O
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C
[Cu(H2O)4]SO4H2O
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D
none of these
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Solution

The correct option is C [Cu(H2O)4]SO4H2O
Here, we can see that Aqueous copper sulphate solution is
aqueous CuSO4 is [Cu(H2O)4]SO4H2O
(a)[Cu(H2O)2+4+KF[CuF4]2green ppt
(b)[Cu(H2O)4]2++KCl[CuCl4]2light green

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