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Chemistry · General Introduction: Electronic configuration and general trends in physical and chemical properties of elements across the periods and down the groups

HI cannot be prepared by the action of conc. on I because is

HI cannot be prepared by the action of conc. \( \boldsymbol{H}_{2} \boldsymbol{S} \boldsymbol{O}_{4} \) on \( \mathrm{K} \) I because \( \boldsymbol{H}_{2} \boldsymbol{S} \boldsymbol{O}_{4} \) is \( -? \)

  • A. oxidising agent
  • B. reducing agent
  • C. A and B
  • D. None of these

Step-by-step solution

Conc. H2SO4 is a strong oxidizing agent. It oxidizes HI (which is a strong reducing agent) to I2, preventing the formation of HI. Thus, HI cannot be prepared by reacting conc. H2SO4 with KI.
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