Question

Cyclohexane, methylcyclopentane, $1$, $3$-dimethyl cyclobutane and $1,2,3$ -trimethyl cyclopropane are examples of which one of the following?

• A. Constitutional isomers
• B. Positional isomers
• C. Structural isomers
• D. Structural as well as positional isomers

Answer 1

Answer: (A), (C)

Structural isomerism or constitutional onsomerism (as per $IUPAC$) is the phenomenon in which two isomers have same molecular formula but differ in the relative arrangement of atoms. Nuclear (structural) isomers of $C_6{H}_{12}$ are