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in P - block elements by (63.8k points)

HI can not be prepared by heating NaI with conc.H2SO4. Give the method which is preferred for the preparation of HI.

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HI is a strong reducing agent and, therefore, reduces H2SO4 to SO2 and itself get oxidised to I2

3NaI + H3PO4  K3PO4 + HI

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