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Elements of Groups 16, 17 and 18 — Chemistry STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceChemistryElements of Groups 16, 17 and 182 Marks
Question
Why is HCl a weaker acid than HI?
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Answer

  • Bond length of HCl is less than HI.
  • Cl is more electronegative than I.
  • Hence bond strength of HCl is more than HI.
  • Therefore HCl dissociates less than HI, which makes HCl a weaker acid than HI.

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