[Campbell Biology P.110] Which of the following statements about structural isomers is corre... | Practice Question

Which of the following statements about structural isomers is correct based on the provided text?

  • A: Structural isomers have the same molecular formula but differ in the spatial arrangement around a double bond.
  • B: Pentane and 2-Methylbutane are examples of structural isomers, both having the molecular formula C5H12.
  • C: The number of possible structural isomers decreases as the carbon skeleton increases in size.
  • D: Structural isomers can always be superimposed on each other.

Explanation

The text explicitly states that structural isomers differ in the covalent arrangements of their atoms. Figure 4.7a illustrates Pentane and 2-Methylbutane as two structural isomers of C5H12. The text also clarifies that the number of isomers increases tremendously with increasing carbon skeleton size.