Chemistry - Nomenclature Question with Solution | TestHub

Explain the question :

The question is asking to select the incorrect statement.

Concept :

This question is based on multiple concepts of nomenclature, homologous series and type of carbon atom.

Solution :

(1) Alkanes are saturated hydrocarbons (only single bonds)

The general formula for acyclic (open-chain) alkanes is ${\mathrm{C}}_{\mathrm{n}}{\mathrm{H}}_{2\mathrm{n}+2}$

(2) A homologous series is a group of organic compounds that:

• Belong to the same family (e.g., alkanes)

• Have the same functional group.

• Differ by a –CH₂– unit.

• Show gradual change in physical properties (like boiling point)

• Have similar chemical properties.

(3) IUPAC is international union of pure and applied chemistry.

(4) Correct statement, n-butane contains two 1° C atoms and two 2° C atoms.

Thus statements (A), (B) & (C) are incorrect.