Question

How to separate $PhCOOH$and $PhC{H_3}$?
A.$KMn{O_4}$
B.$NaHC{O_3}(aq) + n - hexane$
C.${H_2}O$
D.All of the above.

Answer 1

Hint: Benzoic acid $PhCOOH$ is a compound comprising a benzene ring core carrying a carboxylic acid substituent. Toluene$PhC{H_3}$ is an aromatic hydrocarbon composed of a benzene ring linked to one methyl group.

Complete Step by Step Solution:
Benzoic acid appears as a white crystalline solid. Slightly soluble in water. The primary hazard is the potential for environmental damage if released. Immediate steps should be taken to limit spread to the environment. Used to make other chemicals, as a food preservative, and for other uses.
Toluene is used as a solvent or as a chemical intermediate in various industrial applications. Rapid inhalation of high concentrations of toluene can cause severe neurological complications. Toluene appears as a clear colorless liquid with a characteristic aromatic odor. Flash points are less dense than water and insoluble in water. Hence floats on water. Vapors heavier than air. May be toxic by inhalation, ingestion or skin contact. Used in aviation and automotive fuels, as a solvent, and to make other chemicals.
$PhCOOH$ dissolves in $NaHC{O_3}(aq)$ solution but toluene is not soluble in $NaHC{O_3}(aq)$ ​ but dissolves in $n - hexane$.

Hence, the correct option is (b).

Note: Toluene is a clear, colorless liquid with a distinctive smell. Toluene occurs naturally in crude oil. It is also produced in the process of making gasoline and other fuels from crude oil and making coke from coal. Toluene is used in making paints, paint thinners, fingernail polish, lacquers, adhesives, and rubber and in some printing and leather tanning processes.