MHT CET 2017 Chemistry Solved Paper

(c) In the preparation of sulphuric acid (H2SO4) by lead chamber process, mixture containing SO2 air and NO is treated with steam (H2O). In this reaction, NO acts as a catalyst.
2SO2 +

O2

(from‌air)

+ 2H2O + [NO]Catalyst → 2H2SO4 +

[NO]

Catalyst