the amorphous solid A is sulphur (s8) while gas b is sulphur dioxide.
S8 + 8O28SO2
The gas SO2 turns the lime water milky.
Roasting of sulphide ore :
2ZnS + 3o22ZnO + 2SO2
Hence sulphur dioxide is produced during the roasting of sulphide ore.
The gas B decolourise the acidified KMnO4 solution and reduces Fe3+ to Fe2+
2KMnO4 + 5SO2 +2H2O K2SO4 + 2MnSO4 + 2H2SO4
Fe(SO4)3 + SO2 + 2H2O 2FeSO4 + 2H2SO4
Rate this question :