Question

What is the secondary suffix for aldehyde?
A.-al
B.-one
B.-oic acid
C. -oate

Answer 1

Hint: To answer this question, recall the concept of IUPAC nomenclature of IUPAC compounds. The IUPAC system rose to the necessity due to a need for a systematic approach to a large number of discoveries of organic compounds which made the vernacular and common nomenclature of organic compounds highly inconvenient.

Complete step by step answer:
A set of rules has been formulated by IUPAC for a systematic approach for the nomenclature of organic compounds which has been revised from time to time. Any IUPAC name of the given organic compound consists of three parts of the name which are: parent name, prefix and suffix. A suffix can be defined as a functional group in the molecule which follows the word root.
 It has two types:
Primary suffix: We write it immediately after the word root. In the case of alkanes, this suffix is ane.
Secondary suffix: This suffix is written after the preceding primary suffix.
For instance, if a compound has alkane and alcohol group attached to it, the naming will be alkanol, -ol being the suffix for alcohol. For aldehyde, the secondary suffix for an aldehyde is -al.

Thus, the correct option is option A.

Note:
According to the guidelines created by IUPAC, one should follow the below list of steps for the nomenclature of compounds:
-The Longest Chain Rule
-The Lowest Set of Locants
-Multiple instances of the same substituent
-The naming of different substituents
-Correct naming of different substituents in case they are present at the same positions
-Naming Complex Substituents