Explain the variation in physical state of members of homologous series
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The physical state of the members of a homologous series can vary depending on the number of carbon atoms in the molecule and the functional groups present. As the number of carbon atoms increases, the molecules become larger and more complex, which can affect their physical state.
In general, the members of a homologous series with fewer carbon atoms tend to be gases or liquids at room temperature, while the members with more carbon atoms tend to be solids. This is because the larger molecules have stronger intermolecular forces, which make them more difficult to vaporize or liquefy.
However, the presence of certain functional groups can also affect the physical state of the members of a homologous series. For example, the presence of an alcohol group (-OH) can make a molecule more polar, which can cause it to be more soluble in water and less likely to be a gas or a solid at room temperature.
Overall, the variation in the physical state of the members of a homologous series is determined by the number of carbon atoms and the functional groups present in the molecule. As the number of carbon atoms increases and the functional groups change, the physical state of the molecules will also change.