What is not true regarding compound [B]?

(A) They are higher boiling liquids than aldehydes and ketones due to extensive H Bonding

(B) They are soluble in Benzene

(C) They produce alkane when heated with soda lime

(D) Produces CO2 when treated with NaHСО3

Choose the correct answer from the options given below:

The correct option is (B) only(A) only.

To understand why this option is correct, let us analyze the properties of Compound [B], which represents a carboxylic acid (R-COOH), and evaluate the validity of each statement:

Statement (A): They are higher boiling liquids than aldehydes and ketones due to extensive H Bonding.
This statement is true. Carboxylic acid molecules undergo extensive intermolecular hydrogen bonding to form stable cyclic dimers. This association double-folds the effective molecular size and increases the intermolecular forces significantly compared to aldehydes and ketones of comparable molecular masses (which only exhibit weaker dipole-dipole interactions). Consequently, carboxylic acids have higher boiling points.

Statement (B): They are soluble in Benzene.
This statement is generally considered not true (false) or highly limited for lower aliphatic carboxylic acids (like formic acid or acetic acid). Lower carboxylic acids are highly polar due to the presence of both carbonyl and hydroxyl groups, making them highly soluble in polar solvents like water but insoluble or poorly soluble in non-polar organic solvents like benzene.

Statement (C): They produce alkane when heated with soda lime.
This statement is true. When carboxylic acids or their sodium salts are heated with soda lime (a mixture of sodium hydroxide and calcium oxide), they undergo a decarboxylation reaction to yield alkanes containing one less carbon atom than the parent carboxylic acid:
$$\text{R-COONa}+\text{NaOH}\stackrel{\text{CaO, Δ}}{\to }\text{R-H}+{\text{Na}}_2{\text{CO}}_3$$

Statement (D): Produces CO₂ when treated with NaHCO₃.
This statement is true. Carboxylic acids are sufficiently acidic to decompose weak carbonate bases like sodium bicarbonate. Treating them with sodium bicarbonate (${\text{NaHCO}}_3$) results in the evolution of carbon dioxide gas (${\text{CO}}_2$) with brisk effervescence:
$$\text{R-COOH}+{\text{NaHCO}}_3\to \text{R-COONa}+{\text{H}}_2\text{O}+{\text{CO}}_2\uparrow$$

Since statement (B) is the incorrect description regarding the general solubility characteristics of lower carboxylic acids in benzene, the correct choice corresponds to (B) only(A) only.