Question

35.
The key step in the manufacture of
H2SO, by contact process is
(1) S + O2 → SO2
(2) ZnS + O2 → ZnO + SO2
(3) 2SO2+02 = 2SO3,
(4) SO3 + H2SO2 → H2S2O7​

Answer 1

Answer:

The key step in the manufacture of

H2SO, by contact process is

(1) S + O2 → SO2

(2) ZnS + O2 → ZnO + SO2

(3) 2SO2+02 = 2SO3,

in this word ..............