When potassium ferrocyanide crystals are heated with concentrated sulphuric acid, the gas evolved is
A. `SO_(2)`
B. `NH_(3)`
C. `CO_(2)`
D. CO

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1 Answers

Correct Answer - D
`K_(4)[Fe(CN)_(6)]+6H_(2)SO_(4)+6H_(2)Orarr2K_(2)SO_(4)+FeSO_(4)+3(NH_(4))_(2)SO_(4)+6CO`

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