Question

A primary suffix are:
A) - ane
B) - ene
C) – yne
D) All of these

Answer 1

Hint: Primary suffix indicates the nature of linkage in carbon atoms in an organic molecule. For carbon atoms linked by a single covalent bond are named using a particular suffix, for carbon atoms linked by a double bond are named using a particular suffix and similarly, when two carbon atoms linked by a triple bond are named with a particular suffix. Refer to their naming to answer this question.

Complete step by step solution:
The IUPAC nomenclature method is used for the naming of the organic compounds. According to the IUPAC system, the systematic naming of the organic compounds consists of three parts:
- Root word
- Prefix
- Suffix
Root word: A root word indicates the nature of the basic carbon skeletal structure.
Prefix: Prefix is written before the root word. They are of two types: Primary prefix and secondary prefix.
Suffix: The root word is linked to the suffix or suffix is written after the root word. Primary Suffix and secondary suffix are two types of suffix.
Let us discuss the primary suffix because its knowledge is required to answer the question.
- Primary suffix: Primary suffix indicates the degree of saturation i.e., single bond or degree of unsaturation i.e., double or triple bond in a carbon chain.
For single bonded carbon-carbon atoms, the primary suffix is “- ane”.
For double bonded carbon-carbon atoms, the primary suffix is “- ene”.
For triple bonded carbon-carbon atoms, the primary suffix is “- yne”.

Hence, among the given options, option (D) is the correct answer.

Note: If the parent chain of the organic molecule contains more number of double or triple bonds, then the following primary suffixes are used:
For two double bonds- diene; For three double bonds- triene.
For two triple bonds- diyne; For three triple bonds- triyne.