NEET Chemistry The p-Block Elements (XII) Questions Solved


H2SO4  cannot be used to prepare HI from KI as:

(A) Its reaction with KI is very slow.                   (B) It oxidizes HI to iodine.
(C) It disproportionates HI.                                (D) It reduces HI.

(B) H2SO4  is stronger oxidising agent and Hl is stronger reducing agent. So H2SO4  oxidises to HI to I2  and is itself reduced to SO2.

NaI+H2SO4NaHSO4+HI

HI+H2SO4I2+SO2+2H2O

Difficulty Level:

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