AP EAMCET Engineering 23 Apr 2019 Shift 1 Paper

Identify the correct statements from the following:
i. Sulphuric acid is manufactured by contact process.
ii. SO3 dissolves in H2SO4 to formpyrosulphuric acid.
iii. H2SO4 is used in the manufacture of fertilizers such as ammonium sulphate and super phosphate.
iv. In the reaction S + 2H2SO4 (Conc.) → 3SO2 + 2H2O, H2SO4 is oxidized to SO2.