A) \[HI\] is stronger than \[{{H}_{2}}S{{O}_{4}}\]
B) \[HI\] is more volatile than \[{{H}_{2}}S{{O}_{4}}\]
C) \[{{H}_{2}}S{{O}_{4}}\] is an oxidising agent
D) \[{{H}_{2}}S{{O}_{4}}\] forms complex
Correct Answer: C
Solution :
\[KI+{{H}_{2}}S{{O}_{4}}\,\to \,KHS{{O}_{4}}+HI\] HI is formed but it is further oxidised by conc. \[{{H}_{2}}S{{O}_{4}}\] into \[{{I}_{2}}\] \[2HI+{{H}_{2}}S{{O}_{4}}\,\to \,2{{H}_{2}}O+\underset{\text{Violet vapour}}{\mathop{{{I}_{2}}+S{{O}_{2}}}}\,\uparrow \]
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