p-Block elementsHard

Question

Which of the following compound is obtained on heating potassium ferrocyanide with concentrated H2SO4?

Options

A.CO2
B.CO
C.C2H2
D.(CN)2

Solution

K4 [Fe(CN)6] + 6H2SO4 (conc) + 6H2O 2K2SO4 + FeSO4 + 3(NH4)2SO4 + 6CO

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