Question

HI acid heated with concentrated H2SO4 gives....​

Answer 1

Answer:

HI reduces sulphuric acid to sulphur dioxide and itself is oxidised to iodine. Hence, HI is prepared by heating KI with conc. phosphoric acid.

Answer 2

Answer:

HI acid heated with concentrated sulphuric acid ($H_{2}$$SO_{4}$)  gives Sulphur dioxide ($SO_{2}$) and Iodine.

Explanation:

• HI reduces sulphuric acid to sulphur dioxide and itself is oxidized to iodine.
• $HI_{}$ + $H_{2}SO_{4}$ ⇒ $SO_{2}$ + $H_{2} O_{}$ + $I_{2}$
• The mixture of iodide and phosphoric acid produces hydrogen iodide (HI).
• HI cannot be prepared by the action of conc. $H_{2}SO{4}$ on KI because $H_{2}SO_{4}$  is an oxidizing agent and HI is a strong reducing agent. HI reacts with Sulphuric acid and produces Sulphur Dioxide and Iodine.