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Benzoic acid and 2-naphthol have the same melting point (121 - 122 °C). An unknown compound...

Benzoic acid and 2-naphthol have the same melting point (121 - 122 °C). An unknown compound has a melting point of 121 - 122 °C. Melting point of a mixture of pure benzoic acid and your unknown sample was 116-121 °C. Melting point of a mixture of 2-naphthol and your unknown sample was 110 - 116 °C. What is your unknown?

A. benzoic acid

B. 2-Naphthol

C. Either benzoic acid or 2-naphthol

D. Neither benzoic acid or 2-naphthol

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