Question

$C_3{H}_6,C_4{H}_8$ and $C_5{H}_{10}$ belong to the same homologous series. The melting and boiling points of $C_5{H}_{10}$ are higher than that of $C_4{H}_8$.

• A. True
• B. False

Answer 1

The correct option is A True

$C_3{H}_6,C_4{H}_8$ and $C_5{H}_{10}$ belong to the same homologous series because each compound differs by $-C{H}_2-$ units with the preceding one and each compound belongs to the same functional group.

In homologous series, the molecular masses of succeeding members are higher than the preceding members. As the molecular masses increases, the melting and boiling points also increase. So, melting and boiling points of $C_5{H}_{10}$ are higher than the others in the given series.