SO2 releases this in the presence of moisture
Oxygen
Hydrogen
Nitrogen
Sulphur
Sulphur is extracted by a process called
Frasch process
Contact process
Lead chamber process
Bergius process
The formula of crystalline copper sulphate is
CuSO4H2 O
CuSO43H2 O
CuSO4 7H2 O
CuSO4 5H2 O
The pink colour of potassium permanganate disappears by the addition of
SO2
HCl
H2S
CO2
Lead chamber process is the method for the preparation of
H2SO4
The formula of sugar is
C6 H12O6
C12 H22O11
C5 H10O5
H2SO2O7
King of chemicals is
HNO3
H2SO3
The black mass obtained on adding concentrated sulphuric acid to starch is
C2H2
C
The allotrope of sulphur which is insoluble in carbon disulphide
Rhombic sulphur
Monoclinic sulphur
Plastic sulphur
Powdered sulphur
