Identify the correct statements from the following :
i. Sulphuric acid is manufactured by contact process.
ii. `SO_(3)` dissolves in `H_(2)SO_(4)` to form pyrosulphuric acid.
iii. `H_(2)SO_(4)` is used in the manufacture of fertilisers such as ammonium sulphate and super phosphate.
iv. In the reaction, `S + 2H_(2)SO_(4) ("Conc.") rarr 3SO_(2) + 2H_(2)O, H_(2)SO_(4)` is oxidised to `SO_(2)`.

Options

A. i,ii,iii, iv
B. i,ii, iv only
C. i,iii, iv only
D. i,ii,iii only

Answer

D

Explanation

Among the given statements (i), (ii) and (iii) are correct whereas (iv) is incorrect. The correct explanation of (iv) is as follows :
In the reaction,

Here, S is getting oxidised to `SO_(2)`.