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Q.
The general formula $ {{C}_{n}}{{H}_{2n}}{{O}_{2}} $ could be for open chain
ManipalManipal 2012Organic Chemistry – Some Basic Principles and Techniques
Solution:
$ {{C}_{n}}{{H}_{2n}}{{O}_{2}} $ is the general formula for open chain carboxylic acid and ester, e.g., if
$ n=3\Rightarrow {{C}_{3}}{{H}_{6}}{{O}_{2}} $
Acid- $ C{{H}_{3}}C{{H}_{2}}COOH $
Ester- $ C{{H}_{3}}COOC{{H}_{3}} $