Sulphuric acid is considered as the king of chemicals. The prosperity of any country is measured by the amount of sulphuric acid it consumes. Sulphuric acid is, thus, a substance of very great commercial importance as it used practically ine every important industry. This is due to the following properties of sulphuric acid :
(a) acidic nature
(b) oxidising nature
(c) dehydrating nature
(d) sulphonation.
Which of the following reactions depict the oxidising behaviour of `H_2 SO_4` ?

Options

A. `2PCl_(5)+H_(2)SO_(4) to 2POCl_(3)+2HCl + SO_(2)Cl_(2)`
B. `2NaOH + H_(2)SO_(4) to Na_(2)SO_(4) + 2H_(2)O`
C. `NaCl + H_(2)SO_(4) to NaHSO_(4) + HCl`
D. `2HI + H_(2)SO_(4) to I_(2) +SO_(2) +2H_(2)O`

Answer

D

Explanation

`overset(-1)(2HI)+overset(+6)(H_(2)SO_(4))to overset(0)(I_(2))+overset(+4)(SO_(2))+2H_(2)O`
Thus, `H_(2)SO_(4)` oxidises `HI` to `l_(2)`