The formula of crystalline copper sulphate is
CuSO4H2 O
CuSO43H2 O
CuSO4 7H2 O
CuSO4 5H2 O
Sulphur dioxide dissolves in water to form
H2 SO4
H2S2O7
H2SO3
Hyposulphuric acid
The formula of sugar is
C6 H12O6
C12 H22O11
C5 H10O5
H2SO2O7
The pink colour of potassium permanganate disappears by the addition of
SO2
HCl
H2S
CO2
The transition temperature of Rhombic sulphur and Monoclinic sulphur is
230o C
440o C
119o C
96o C
Sulphur is extracted by a process called
Frasch process
Contact process
Lead chamber process
Bergius process
The black mass obtained on adding concentrated sulphuric acid to starch is
H2SO4
C2H2
C
