Alkanes

  • M/J 2020/P12/Q33

Which structure represents an isomer of butane?

Answer: ​​ C

Explaination

Isomers are compounds that have same molecular formula (same number of atoms) but different structural formula.

Butane molecular formula: ​​ C4H10 ​​ ​​ ​​ ​​ ​​ ​​​​ ( CnH2n+2​​ )

So, option C is an isomer of butane and its name is 2-methyl propane/iso butane.