Advertisements
Advertisements
प्रश्न
Account for the following:
Carboxylic acid is a stronger acid than phenol.
उत्तर
Carboxylic acids are acidic due to resonance stabilisation of carboxylate anion and in phenols, acidic character is present due to resonance stabilisation of phenoxide anion. Carboxylic acids are more acidic than phenols because the negative charge in carboxylate anion is more spread out compared to the phenoxide ion, as there are two electronegative O-atoms in carboxylate anion compared to one in phenoxide ion. In the resonance structures of carboxylate anion, the negative charge is present on the O-atoms, while in resonance of phenoxide ion, negative charge is also present on electropositive carbon atom, which leads to less stability of phenoxide ion than carboxylate anion.
APPEARS IN
संबंधित प्रश्न
How is 1-nitropropane prepared from suitable oxime?
Although phenoxide ion has more number of resonating structures than carboxylate ion, carboxylic acid is a stronger acid than phenol. Give two reasons.
CH3CO2H or CH2FCO2H
Complete the following reaction sequence.
\[\begin{array}{cc}
\ce{O}\phantom{...............................................}\\
||\phantom{...............................................}\\
\ce{CH3 - C - CH3 ->[(i) CH3MgBr][H2O] (A) ->[Na metal][Ether] (B) ->[CH3 - Br] (C)}
\end{array}\]
Assertion: Formaldehyde is a planar molecule.
Reason: It contains sp2 hybridised carbon atom.
Acidity of BF3 can be explained on the basis of which of the following concepts?
A mixture of benzaldehyde and formaldehyde on heating with 50% NaOH solution gives
When propionamide reacts with Br2 in the presence of alkali the product is ______.
Na2CO3 cannot be used in place of (NH4)2CO3 for the precipitation of the V group because ______.
Formic acid and formaldehyde can be distinguished by treating with ______.
