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MHT CET202520 Apr 2025Morning ShiftChemistryp Block Elements (Group 15, 16, 17 & 18)Actual

Identify false statement from the following about fluorine.

Options

  1. AIt is highly electronegative element.
  2. BIt exhibits only -1 oxidation state.
  3. CIt has high bond dissociation enthalpy among all halogens.
  4. DIt form only one oxoacid.

Correct answer

C. It has high bond dissociation enthalpy among all halogens.

Step-by-step solution

Analysis of statements about fluorine: Fluorine is the most electronegative element (Pauling scale 3.98), confirming statement A is true. Due to its extreme electronegativity, fluorine cannot exhibit positive oxidation states and maintains only a -1 oxidation state, making statement B true. The order of bond dissociation enthalpy is Cl ₂ (242 kJ/mol) > Br ₂ (193 kJ/mol) > F ₂ (158 kJ/mol) > I ₂ (151 kJ/mol). Interelectronic repulsions between lone pairs in F ₂ weaken its bond, making it lower than chlorine and brom

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