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The general molecular formula, which represents the homologous series of alkanols is

1. C2H2O
2. C2H2n+1O
3. C2H2n+2O
4. C2H2nO2

Correct answer: C2H2n+2O

Solution

The general molecular formula for alkanols (alcohols) is CnH2n+2O, as they are derived from alkanes (CnH2n+2) by replacing one hydrogen atom with a hydroxyl (-OH) group.

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