Question

Pick out the correct set of statements for HI.

$1.$ It reduces iodic acid to $I_{2}$

$2.$ It reduces $H_{2}SO_{4}$ to $SO_{2}$

$3.$ It decolourises acidified $KMnO_{4}$

$4.$ It liberates $I_{2}$ with $CuSO_{4}$ solution

• A. 1, 2, 3
• B. 1, 2, 4
• C. 1, 3, 4
• D. 1, 2, 3, 4

Answer 1

Answer: (D)

Here all statements are correct here regarding HI as follows

$2KMnO_{4}+3H_{2}SO_{4}+10HI \rightarrow K_{2}SO_{4}+2MnSO_{4}+8H_{2}O+5I_{2}$

$H_{2}SO_{4}+2HI \rightarrow SO_{2}+I_{2}+2H_{2}O$

$HIO_{3}+5HI \rightarrow 3I_{2}+3H_{2}O$

$2CuSO_{4}+4HI \rightarrow 2CuI_{2}+2H_{2}SO_{4}$

$2CuI_{2} \rightarrow Cu_{2}I_{2}+I_{2}$