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MHT CET20255 May 2025Evening ShiftChemistryp Block Elements (Group 15, 16, 17 & 18)Actual

Which of the following halogens does always show oxidation state -1 ?

Options

  1. ACl
  2. BF
  3. CBr
  4. DI

Correct answer

B. F

Step-by-step solution

The oxidation state represents the number of electrons gained or lost when an atom forms chemical bonds. Halogens typically achieve a noble gas configuration by gaining one electron, resulting in a -1 oxidation state. Fluorine consistently exhibits a -1 oxidation state due to its maximum electronegativity and absence of d-orbitals, preventing positive oxidation states. Other halogens ( chlorine, bromine, iodine ) can display positive oxidation states (+1, +3, +5, +7) when bonded to more electronegative elements lik

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