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When potassium ferrocyanide crystals are...

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

Text Solution

Verified by Experts

The correct Answer is:
D
`[K_4Fe(CN)_6] + 6H_2SO_4 + 6H_2O to 2K_2SO_4 + FeSO_4 + 3(NH_4)_2SO_4 + 6CO`
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