Small amounts of iodine can be made through the reaction of solid sodium iodide, NaI, with concentrated sulphuric acid, H2SO4. The first stage is formation of HI, which is a gas, but under the reaction conditions some of the HI is oxidized by further H2SO4 to form iodine and sulphur dioxide.

NaI (s) + H2SO4 (l)  HI (g) + NaHSO4 (s)

2HI (g) + H2SO4 (l)  I2 (g) + SO2 (g) + 2H2O (l)
  
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Se 
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Te I Xe 
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compounds 
Select formula from below: 
Fluorides 
IF
IF3
IF5
IF7 
Chlorides 
ICl
[ICl3]2 
Bromides 
IBr 
Iodides 
none listed 
Hydrides 
none listed