1. 1-Butanol ($\mathrm{C}{\mathrm{H}}_3\mathrm{C}{\mathrm{H}}_2\mathrm{C}{\mathrm{H}}_2\mathrm{C}{\mathrm{H}}_2\mathrm{OH}$) and 2-methyl‑1‑propanol ($(\mathrm{C}{\mathrm{H}}_3{)}_2\mathrm{CHC}{\mathrm{H}}_2\mathrm{OH}$) are structural isomers. State the type of isomerism they exhibit.

Step-by-step solution

1. Identify the molecular formula of both compounds: both have formula ${\mathrm{C}}_4{\mathrm{H}}_{10}\mathrm{O}$.
2. Observe that the carbon skeletons are different: straight‑chain in 1‑butanol, branched in 2‑methyl‑1‑propanol.
3. Since only the carbon chain differs while functional group remains the same, the isomerism is chain (skeletal) isomerism.
4. Write the final statement.

Concept tested: Types of structural isomerism

Published 8 September 2026 · How this solution was prepared and checked