TS EAMCET 10-Sep-2020 Shift 2 Solved Paper

The final acid product obtained during the synthesis of H2SO4 by contact process is H2S2O7 i.e. oleum.
The following reaction(s) are involved in the formation of oleum.
(i) 2SO2+O2⇌2SO3
(ii) H2SO4+SO3⟶

H2S2O7

Oleum

Hence, option (d) is the correct answer.