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SAT Chemistry

Category - Multiple Choice

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Which of the following molecules exhibits resonance?

H₂O
CO₂
O₂
O₃
SO₂

Explanation

Answer: O₃

Resonance occurs when two or more bonds show double bond character. This effect occurs when a double bond in either location is energetically equal. The best way to identify resonance is to draw Lewis structures. In the context of this question, O₃ is the only molecule to exhibit resonance.

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