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Question:

The IUPAC name of neopentane is:

2, 2-dimethylpropane

2-methylbutane

2-methylpropane

2, 2-dimethylbutane

Solution:

The IUPAC name of neopentane is 2,2-dimethylpropane. Neopentane has 5 carbon atoms in total. 4 Carbon atoms are attached to 1 atom. Thus, the longest chain has 3 C atoms, where the second atom has 2 methyl groups. Hence, the correct option is B