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प्रश्न
Account for the following:
pKa value of 4-nitrobenzoic acid is lower than that of benzoic acid.
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उत्तर
The conjugate base formed after the removal of hydrogen is highly stable due to the presence of electron withdrawing group (NO2). Hence, it is more acidic than the benzoic acid.
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संबंधित प्रश्न
Identify the strongest acid amongst the followings:
- Chloroacetic acid
- Acetic acid
- Trichloroacetic acid
- Dichloroaceticacid
Explain, why are boiling points of carboxylic acids higher than corresponding alcohols
\[\ce{Acetic acid ->[i. LiAIH4][ii. H3O^+] X}\]
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].
Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their:
