The P Block Elements - Result Question 80
####83. HI can be prepared by all the following methods, except
[1994]
(a) $PI_3+H_2 O$
(b) $KI+H_2 SO_4$
(c) $H_2+I_2 \xrightarrow{Pt}$
(d) $I_2+H_2 S$
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Solution:
- (b) $HI$ cannot be prepared by heating iodides with concentrated $H_2 SO_4$. The reaction between $KI & H_2 SO_4$ is as follows:
$8 KI+5 H_2 SO_4 \longrightarrow 4 K_2 SO_4+4 I_2+4 H_2 O+H_2 S$
