Question

Total number of structural isomers of $C_9H_{18}$ containing cyclohexane ring:
A.16
B.14
C.12
D.None of these

Answer 1

Hint: Isomers are molecules with similar molecular formulas — that is, the same number of atoms of and compound — but different atomic configurations in space, according to chemistry. Isomerism refers to the presence or potential of isomers. Isomers don't quite have the same chemical or physical properties as one another.

Complete answer: A structural isomer, also known as a constitutional isomer, is an organic compound that has the same molecular composition but differs in shape. While the two molecules below have the same chemical composition, they are distinct due to the position of the methyl group.
The structural isomers are isomers that vary in the atomic structure of molecules without any relation to the spatial arrangement. Structural isomerism is the term for the phenomenon of structural isomers.
According to the IUPAC, structural isomerism is also known as constitutional isomerism. In contrast to stereoisomerism, it is a type of isomerism in which molecules with the same molecular formula have different orders and bondings.
There are a total of 12 structural isomers of $C_9H_{18}$ with a cyclohexane ring.

Chain isomerism, position isomerism, and functional group isomerism are the three forms of structural isomerism.
A variation in the atomic arrangement of the hydrogen to the carbon chain of a molecule is known as chain isomerism. Chain isomerism is a property that occurs when two or more molecules have the same type of molecular formula but different main chains. Skeletal isomerism is another name for this condition.
When the peculiar type of functional groups with the same chemical composition coexist, this is known as functional group isomerism. Functional isomerism is a property of a substance that has two distinct configurations but the same chemical composition.

Note:
When there is a discrepancy in the locations filled by substituent atoms or a set of atoms, or when the chain is unsaturated, positional isomerism occurs. Location isomerism is a condition that occurs when the position of functional groups in relation to the main chain atom varies.