Multiple choice

Which of the following statements regarding ozone is not correct?

  1. Ozone is an allotropic form of oxygen.

  2. Ozone is thermodynamically more stable than oxygen.

  3. The two O-O bond lengths in ozone are identical.

  4. Ozone is used as a germicide and disinfectant.

  5. Ozone is a non-polar molecule.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ozone is thermodynamically unstable with respect to oxygen since its decomposition into oxygen results in the liberation of heat (DH is -ve) and an increase in entropy (DS is +ve). These two effects reinforce each other, resulting in large negative Gibb's energy change (DG) for its conversion into oxygen.

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