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Solution


Q.

Incorrect statement is
1 In carboxylic acids, the bonds to the carboxyl carbon lie in one plane and are separated by about 120°.  
2 The carboxylic carbon is less electrophilic than carbonyl carbon because of the resonance in carboxylic acid.  
3 Aliphatic carboxylic acids upto nine carbon atoms are colorless liquids at room temperature with pleasant odours.  
4 Most carboxylic acids exist as dimer in the vapour phase.  

Ans.

(3)

Aliphatic carboxylic acids upto nine carbon atoms are colorless liquids at room temperature with unpleasant odours.