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AP EAMCET202316 May 2023Evening ShiftChemistryChemical Bonding and Molecular StructureActual

Which of the following are not in accordance with the property mentioned against them? I. F ₂> Cl ₂> Br ₂> I ₂ : Oxidising power II. MI > MBr > MCl > MF : Ionic character of metal halide III. F ₂> Cl ₂> Br ₂> I ₂ : Bond dissociation enthalpy IV. HI < HBr < HCl < HF : Hydrogen-halogen bond strength

Options

  1. AI & III only
  2. BII & III only
  3. CI & IV only
  4. DII & IV only

Correct answer

B. II & III only

Step-by-step solution

Ionic character of metal halide :- M - F > M - Cl > M - Br > M - I This is due to low polarizability of fluorine due to very small size which gives more ionic character. Thus, II is incorrect. Order of bond dissociation enthalpy :- Cl ₂> Br ₂> F ₂> I ₂ This is due to very small size and F - F bond length that causes repulsion between the atoms and possible multiple bonds between Cl ₂, Br ₂ and I ₂ due to availability of d orbitals. Thus, III is incorrect.

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