In disubstituted benzene nomenclature, the prefix para (p-) indicates which relative positions?
A1,2-
B1,3-
C1,4-
D2,3-
Answer & Solution
Correct answer: C. 1,4-
Para means the two substituents are opposite each other on the benzene ring, corresponding to the 1,4- relationship. Ortho is 1,2- and meta is 1,3-.
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