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(i) Most aromatic acids are solids while acetic acid and others of this series are liquids. (ii) Explain why ketones are less reactive towards nucleophiles than aldehydes. |
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Answer» Solution :(i) Aromatic acids have higher molecular weight. Therefore, they experience greater van der Waals. FORCE of attraction as compared to aliphatic acids. Therefore, aromatic acids are solids. (ii) Ketones are less reactive towards nucleophiles than aldehydes because in ketones there are two alkyl groups which decrease positive charge on carbonyl group due to electron repelling nature (electron RELEASING nature) whereas in aldehyde there is ONE alkyl group which is electron releasing. Also two alkyl groups in ketone offer more steric hindrance to the incoming NUCLEOPHILE. |
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