Question

The general formula of a homologous series of carbon compounds is C_nH_2n. Write the molecular formulae of the second and fourth members of the series.

Answer 1

The C_nH_2n is the general formula for the homologous series of alkenes. The second and the fourth members of this series will have the molecular formulae C₃H₆ and C₅H₁₀, respectively.