Q: Which type of isomers generally have lower boiling and melting points than straight-chain isomers?


Read this paragraph and choose the correct option from the provided answers:

Because isomers are different compounds, they have different properties. Generally, branched-chain isomers have lower boiling and melting points than straight-chain isomers. For example, the boiling and melting points of iso -butane are -12 °C and -160 °C, respectively, compared with 0 °C and -138 °C for n -butane. The more branching there is, the lower the boiling and melting points are.

 Choices:

- straight-chain isomers

- branched-looping isomers

- branched - solar isomers

- branched-chain isomers


A:
branched-chain isomers