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SAT Chemistry

Category - Multiple Choice

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Which of the following pairs of compounds are allotropes?

CO₂ and CH₄
NH₄+ and NH₃
NaCl and LiCl
O₂ and O₃
Ne and Ar

Explanation

Answer: O₂ and O₃

Allotropy occurs when a single element exists in multiple forms. In the context of this question, only one pair of compounds consists of a single element. Thus, O₂and O₃ are an allotropes.

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