Question

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

• A. CO2
• B. CO
• C. C2H2
• D. (CN)2

Answer 1

Answer: (B)

CO

Answer 2

K4 [Fe(CN)6] + 6H2SO4 (conc) + 6H2O $\overset{\quad\Delta\quad}{\rightarrow}$2K2SO4 + FeSO4 + 3(NH4)2SO4 + 6CO