The gas that is liberated when iron is heated with concen...
The gas that is liberated when iron is heated with concentrated tetraoxosulphate (VI)acid is
H2S
SO2
HCI
SO3
O2
Correct answer is B
2Fe (s) + 6H2SO4 (l) → Fe2(SO4)3 (aq) + 3SO2 (g) + 6H2O (l)
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