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प्रश्न
Explain, why are boiling points of carboxylic acids higher than corresponding alcohols
उत्तर
The boiling points of carboxylic acids are higher than the corresponding alcohols because
- Carboxylic acids have a high boiling point because of their ability to form intermolecular hydrogen bonds.
- Hydrogen bonds formed in carboxylic acids are stronger than those in alcohols.
- The –OH bond in –COOH is more strongly polarised than the –OH bond of alcohols. This is because of the presence of an electron-withdrawing carboxyl group in an adjacent position in carboxylic acids.
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संबंधित प्रश्न
Identify the strongest acid amongst the followings:
- Chloroacetic acid
- Acetic acid
- Trichloroacetic acid
- Dichloroaceticacid
Account for the following:
pKa value of 4-nitrobenzoic acid is lower than that of benzoic acid.
Why are alkyl halides insoluble in water?
\[\ce{Acetic acid ->[i. LiAIH4][ii. H3O^+] X}\]
Identify X.
\[\ce{Acetone + Methyl magnesium iodide ->[i. Dry ether][ii. HOH/H^+] P}\]
'P' in above reaction is:
Choose the INCORRECT statement.
Two statements are given below:
Statement I: The melting point of monocarboxylic acid with even number of carbon atoms is higher than that of with an odd number of carbon atoms acid immediately below and above it in the series.
Statement II: The solubility of monocarboxylic acids in water decreases with increased molar mass.
Choose the most appropriate option:
Which one of the following acids does not exhibit optical isomerism?
\[\ce{CH3CH2COOH ->[Cl2][red P] A ->[alc. KOH] B}\]. What is B?
An aromatic carboxylic acid [A], which readily sublimes on heating, produces compound [B] on treatment with PCl5, Compound [B], when reduced in the presence of Pd catalyst over BaSO4 poisoned by sulphur in xylene solution, gives compound [C]. When compound [C] is condensed in the presence of alcoholic KCN, it gives compound [D] (Molecular formula of compound [D] is C14H12O2)
Identify the compounds [A], [B], [C] and [D].
