HI can be prepared by all the following methods, except | Chemistry | SolveeIt

Question

HI can be prepared by all the following methods, except

$\ce{PI_3 + H_2 O}$

$\ce{KI + H_2 SO_4}$

$\ce{H_2 + I_2 ->[pt]}$

$\ce{I_2 + H_2S}$

Answer

$\ce{KI + H_2 SO_4}$

Explanation

Solution

HI cannot be prepared by heating iodides with concentrated ${H_2SO_4}$ because HI is a strong reducing agent and reduce ${H_2SO_4}$ to ${SO_2}$ and get themselves oxidised to ${I_2}$ . ${2HI + H_2SO_4 -> SO_2 + I_2 + 2H_2 O}$

Chemistry Question on p -Block Elements

Solution