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  4. When potassium ferrocyanide crystals are heated with concentrated sulphuric acid, the gas evolved as

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Q. When potassium ferrocyanide crystals are heated with concentrated sulphuric acid, the gas evolved as

Coordination Compounds

Solution:

$K _{4}\left[ Fe ( CN )_{6}\right]+6 H _{2} SO _{4}+6 H _{2} O \rightarrow 2 K _{2} SO _{4}+ FeSO _{4} +3\left( NH _{4}\right)_{2} SO _{4}+6 CO$