NEET levelSingle correct optionDifficulty 1 of 3nm117
n-Butane and isobutane (2-methylpropane) show
Aposition isomerism
Bchain isomerism
Cfunctional isomerism
Dmetamerism
Answer: B
Both are CX4HX10 with no functional group; they differ only in the arrangement of the carbon skeleton (straight versus branched), which is chain isomerism.