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HI can be prepared by all the following ...

`HI` can be prepared by all the following methods except

A

`PI_(3)+H_(2)O`

B

`Kl+H_(2)SO_(4)`

C

`H_(2)+I_(2)rarr overset(pt)rarr`

D

`I_(2)+H_(2)S`

Text Solution

Verified by Experts

The correct Answer is:
2
`HI` can't be prepared by heating iodide with concentrated `H_(2)SO_(4)` because `HI` is a strong reducting agent and reduces `H_(2)SO_(4)` to `SO_(2)` and gets oxidized to `I_(2)`
`KI+H_(2)SO_(4)rarr KHSO_(4)+HI`
`H_(2)SO_(4)+2HI rarr SO_(2)+I_(2)+2H_(2)O`
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