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The correct order in which the O — O bond length increases in the following is :

  1. A
    H2O2 < O2 < O3
  2. B
    O3 < H2O2 < O2
  3. C
    O2 < O3 < H2O2
  4. D
    O2 < H2O2 < O3

Solution & Step-by-step Explanation

The O-O bond length increases as the bond order decreases. The bond order is related to the number of electrons involved in bonding between the oxygen atoms. O2 (oxygen molecule) has a bond order of 2, O3 (ozone) has a bond order of 1.5 (since it's a resonance structure with one single and one double bond between the oxygens), and H2O2 (hydrogen peroxide) has a single bond between the oxygens, thus a bond order of 1. As the bond order decreases, the bond length increases due to less effective overlap of the atomic orbitals. Therefore, the correct order of increasing O-O bond length is O2 < O3 < H2O2.

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The correct order in which the O — O bond length increases in the following is :
A
H2O2 < O2 < O3
B
O3 < H2O2 < O2
C
O2 < O3 < H2O2
D
O2 < H2O2 < O3

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Inorganic Chemistry

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