Question detail
When would you use the term 'homologous series' instead of 'functional group'?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Introduction to organic chemistry
Question
- A. When discussing the specific reactions of a compound.
- B. When referring to a group of compounds with similar properties due to a shared functional group.
- C. When identifying the molecular formula of a compound.
- D. When classifying isomers based on their structure.
Answer
When referring to a group of compounds with similar properties due to a shared functional group.
Explanation
The term 'homologous series' is used to describe a group of compounds that share the same functional group, resulting in similar chemical properties. The key difference is that 'functional group' refers to the specific reactive part of a molecule. Homologous series applies when discussing groups of compounds, while functional groups apply to individual compounds. Thus, the second option correctly identifies when to use 'homologous series'.
Common mistake
Homologous Series vs Functional Groups
Students often confuse homologous series with functional groups, thinking they are the same concept.
A homologous series is a group of organic compounds that have the same functional group and similar chemical properties, differing by a constant unit (usually -CH2). A functional group is a specific group of atoms within a molecule that is responsible for the characteristic reactions of that molecule. Homologous series applies when discussing groups of compounds with similar properties, while functional groups apply when identifying reactive parts of individual molecules. Understanding this distinction helps in naming and predicting reactions of organic compounds.
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