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By how many -CH(2)-(methylene) units do ...

By how many -`CH_(2)`-(methylene) units do the formulae of the first two members of homologous series of alkanes, methane `(CH_(4))` and ethane `(C_(2)H_(6))` differ?
Similarly, by how many - `CH_(2)`-units do the neighbouring members ethane `(C_(2)H_(6))` and propane `(C_(3)H_(8))` differ from each other?

Text Solution

Verified by Experts

1. Methane and ethane differ by only one -`CH_(2)`-unit.
2. Ethane and propane also differ by only one -`CH_(2)`- unit.
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