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Which of the following CANNOT be an empirical formula?

Which of the following CANNOT be an empirical formula?
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  • A \(CH\)
  • B \(CH_{2}\)
  • C \(P_{2}O_{5}\)
  • D \(N_{2}O_{4}\)
Correct Answer: Option D
Explanation:
The empirical formula is always in the ratio of the smallest positive integer, hence, \(N_{2}O_{4}\) has an empirical formula \(NO_{2}\).

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