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MHT CET202522 Apr 2025Evening ShiftChemistryp Block Elements (Group 15, 16, 17 & 18)Actual

Which of the following halogen forms maximum number of oxoacids?

Options

  1. AF
  2. BCl
  3. CBr
  4. DI

Correct answer

B. Cl

Step-by-step solution

The formation of oxoacids by halogens depends on the availability of d-orbitals to expand the octet, allowing multiple oxidation states. Fluorine cannot expand its octet and forms only one oxoacid: hypofluorous acid HOF (oxidation state +1 ). Chlorine , with available d-orbitals, forms four stable oxoacids: hypochlorous HClO ( +1 ), chlorous HClO₂ ( +3 ), chloric HClO₃ ( +5 ), and perchloric acid HClO₄ ( +7 ). Bromine forms hypobromous HBrO ( +1 ), bromic HBrO₃ ( +5 ), and perbromic acid HBrO₄ ( +7 ), omitting the

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