The number of dichloro derivatives (structural isomers) of neopentane, 2,2-dimethylpropane, is

Answer: A

Both Cl on the same methyl carbon gives 1,1-dichloro-2,2-dimethylpropane; Cl on two different methyl carbons gives 1,3-dichloro-2,2-dimethylpropane. Total 2.

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