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CGP EDU Academic Team
Published on: August 14, 2026
HI can not be prepared by heating NaI with concentrated H 2 SO 4 . Give the method which is preferred for the preparation of HI.
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
HI is a strong reducing agent and, therefore, reduces H 2 SO 4 to SO 2 and itself get oxidised to Ι 2 .
3Na Ι + conc. H 3 PO 4 
K 3 PO 4 + H Ι
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