Question

The IUPAC name of ${C_6}{H_5}COCl$ is
A. Benzoyl chloride
B. Benzene chloro ketone
C. Benzene carbonyl chloride
D. Chloro phenyl ketone

Answer 1

The IUPAC nomenclature scheme is a collection of conceptual rules developed and used by organic chemists to avoid the problems that arbitrary nomenclature can create. Knowing these laws and being given a structural formula, one should be able to write a distinct name for each compound. Similarly, given an IUPAC tag, a structural formula should be able to be written. An IUPAC name would usually have three characteristics.

Complete answer:
An IUPAC name would, in general, have three characteristics:
• A root or base in a molecular structure that denotes a main chain or ring of carbon atoms.
• A suffix or other element(s) indicating the presence of functional classes in the compound.
• Names of substituent groups that complete the chemical structure but are not hydrogen.
In ${C_6}{H_5}COCl$
Root = Benzene
Suffix = Carbonyl
Substituent = Chloride
Hence option A and C are correct
Benzoyl chloride and Benzene carbonyl chloride are correct
It gets its name from benzoyl chloride, which is made by replacing the -ic acid in benzoic acid with -yl chloride.
Substituted benzene ring compounds have a less systematic nomenclature than alkanes, alkenes, and alkynes. As seen by the combined names mentioned below, a few mono-substituted compounds are named by using a group name as a prefix to "benzene." The rest of these molecules, on the other hand, have one-of-a-kind names.

Note:
Phenyl, abbreviated Ph-, and benzyl, abbreviated Bn-, are two frequently found substituent groups that incorporate a benzene ring. These are shown along with illustrations of how they should be used. A phenyl (pronounced fenyl) group should not be confused with the compound phenol (pronounced feenol). Ar- for an aryl group is a general and useful standardised notation that complements the use of R- for an alkyl group (any aromatic ring).