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Questions
Write the molecular formula of two consecutive members of homologous series of aldehydes. State which part of these compounds determines their
- physical and
- chemical properties
Write the molecular formula of any two consecutive members of homologous series of aldehydes.
Solution 1
The molecular formula of two consecutive members of homologous series of aldehydes:-
\[\ce{CH3 - CHO}\] and \[\ce{CH3 - CH2 - CHO}\]
In \[\ce{CH3 - CHO}\] compound, \[\ce{-CHO}\] part and in \[\ce{CH3 - CH2 - CHO}\], \[\ce{-CH2-CHO}\] part will determine their physical and chemical properties.
Solution 2
Two consecutive members:
| Molecular Formula | Structure | |
| Methanal (Formaldehyde) | \[\ce{CH2O}\] | \[\ce{H - CHO}\] |
| Ethanal (Acetaldehyde) | \[\ce{C2H4O}\] | \[\ce{CH3 - CHO}\] |
Notes
Students should refer to the answer according to their questions.
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