The difference in molecular mass between two consecutive homologous series members will be:

Correct option is C

The difference in molecular mass between two consecutive members of a homologous series is typically 14 g/mol. This is because each consecutive member differs by a CH₂ group, which has a molecular mass of 14 g/mol (12 g/mol for carbon and 2 g/mol for hydrogen). Homologous series are families of organic compounds that have the same functional group and similar chemical properties, with each successive compound differing by a CH₂ unit.

Important Key Points:

1. Homologous series are compounds with the same functional group but differing by a constant unit.
2. The CH₂ group (methyl group) contributes a molecular mass of 14 g/mol.
3. This constant difference in molecular mass helps in identifying and classifying organic compounds in a series.
4. Examples include alkanes, alkenes, alcohols, and acids, which follow this pattern of molecular mass increase.
5. The regular increase in molecular mass by 14 g/mol simplifies the prediction of molecular formulas.

Information Booster:

• 12 (Option a): This would be the difference between two carbon atoms (C₂), not a consecutive pair in a homologous series.
• 08 (Option b): Not applicable as the CH₂ group is the unit of difference.
• 16 (Option d): This would be relevant for differences involving additional functional groups or larger units.