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NTA Abhyas JEE Main2020ChemistryChemical Bonding and Molecular StructurePractice

Consider the following molecules O 2 I , O 2 A s F 6 I I , K O 2 I I I Choose the correct answer regarding O-O bond from the following.

Options

  1. AThe correct decreasing bond order is I > III > II
  2. BThe correct decreasing order of bond length is III > I > II
  3. CThe bond strength of I is less than that of III
  4. DBond dissociation energy is highest in case of III

Correct answer

A. The correct decreasing bond order is I > III > II

Step-by-step solution

In O 2 A s F 6 , O 2 + has bond order 2.5. O 2 has bond order 2.0. In K O 2 , O 2 - has bond order 1.5. Higher the bond order, smaller is the bond length. Hence, the order is O 2 A s F 6 < O 2 < K O 2 .

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