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Question

An aqueous solution containing ferrous cyanide and potassium cyanide in the molar ratio of 1 : 4 is evaporated. The solid obtained is re-dissolved in water. The ion present in this solution is

A
[Fe(CN)6]4
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B
[Fe(CN)6]3
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C
[Fe(CN)3]
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D
Fe3+
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Solution

The correct option is A [Fe(CN)6]4
The solid obtained is
FeSO4+KCNK4[Fe(CN)6]4K++[Fe(CN)6]4

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