[Formation of intermolecul...] Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable

For Competitive Exams

Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their

More extensive association of carboxylic acid via van der Waals force of attraction

Formation of carboxylate ion

Formation of intramolecular H-bonding

Formation of intermolecular H-bonding

Explanation:

Due to formation of intermolecular H-bonding in carboxylic acid, association occurs. Hence boiling point increases and become more than the boiling point of aldehydes, ketones and alcohols of comparable molecular masses.

Additional Questions

Compound $A, C_8H_{10}O$, is found to react with NaOI (produced by reacting Y with NaOH) and yields a yellow precipitate with characteristic smell.
A and Y are respectively

Answer

Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column II and assign the correct code :

Column I	Column II
a. $Co^{3+}$	i. $\sqrt{8}BM$
b. $Cr^{3+}$	ii. $\sqrt{35}BM$
c. $Fe^{3+}$	iii. $\sqrt{3}BM$
d. $Ni^{2+}$	iv. $sqrt{24}BM$
	v. $sqrt{15}BM$

a b c d

Answer

Which one of the following ions exhibits d-d transition and paramagnetism as well?

Answer

Iron carbonyl, $Fe(CO)_5$ is

Answer

The type of isomerism shown by the complex $[CoCl_2(en)_2]$ is

Answer

The geometry and magnetic behaviour of the complex $[Ni(CO)_4]$ are

Answer

Following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations :
a. $60 mL\dfrac{M}{10}HCL+40 mL\dfrac{M}{10} NaOH$
b. $55 mL\dfrac{M}{10}HCL+45 mL\dfrac{M}{10} NaOH$
c. $75 mL\dfrac{M}{5}HCL+25 mL\dfrac{M}{5} NaOH$
d. $100 mL\dfrac{M}{10}HCL+100 mL\dfrac{M}{10} NaOH$
pH of which one of them will be equal to 1?

Answer

On which of the following properties does the coagulating power of an ion depend?

Answer

Given van der Waals constant for $NH_3, H_2, O_2$ and $CO_2$ are respectively 4.17, 0.244, 1.36 and 3.59, which one of the following gases is most easily liquefied?

Answer

The solubility of $BaSO_4$ in water is 2.42 × $10^{–3} gL^{–1}$ at 298 K. The value of its solubility product $(K_{sp})$ will be
(Given molar mass of $BaSO_4 = 233 g mol–1)$

Answer

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