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NTA Abhyas NEET2020ChemistryChemical Bonding and Molecular StructurePractice

Which of the following is not an ionic halide?

Options

  1. AU F 4
  2. BP b C l 2
  3. CS n C l 2
  4. DU F 6

Correct answer

D. U F 6

Step-by-step solution

U F 6 has essentially covalent character. This is because small highly charged cations polarise the anions more effectively. For a metal with variable oxidation states, the halide with higher oxidation state of metal will be more covalent than the halide with lower oxidation of the metal. For example, P b C l 4 , S n C l 4 and U F 6 are more covalent in nature than P b C l 2 , S n C l 2 and U F 4 respectively.

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