Which of the following is not a double salt but is a complex salt ?
Which of the following is not a double salt but is a complex salt ?
A. `KCl MgCl_(2).6H_(2)O`
B. `FeSO_(4)(NH_(4))_(2)SO_(4).6H_(2)O`
C. `K_(2)SO_(4)Al_(2)(SO_(4))_(3).24H_(2)O`
D. `4KCN.Fe(CN)_(2)`.
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