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COMEDK2022ChemistryHydrogen

Which of the following statements is incorrect for H ₂ O ₂ structure?

Options

  1. AIt has an open book structure.
  2. BIts dihedral angle is 180^ .
  3. CIt O - O bond length is 145.8 and O - H is 98.8 .
  4. DAngle between both planes is 90.2 .

Correct answer

B. Its dihedral angle is 180^ .

Step-by-step solution

The structure of hydrogen peroxide ( H ₂ O ₂ ) is non-planar and is commonly described as an open book structure. In the gaseous phase, the dihedral angle between the two O-H planes is approximately 111.5^ , not 180^ . A dihedral angle of 180^ would imply a planar structure, which is not the case for H ₂ O ₂ . The O - O bond length in H ₂ O ₂ is 145.8 pm and the O - H bond length is 98.8 pm. The dihedral angle (angle between the two planes containing the O-H bonds) in the solid state is 90.2^ . Since the dihedral a

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