American Chemical Society (ACS) Chemistry Test 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

What are isomers?

Compounds with the same atomic mass

Compounds that have distinct physical properties

Two or more compounds with the same formula but different arrangements of atoms

Isomers are defined as two or more compounds that have the same molecular formula but differ in the arrangement of their atoms. This can refer to different structural arrangements, such as in structural isomers, where the atoms are connected in different ways, or stereoisomers, where the spatial arrangement of the atoms differs while the connectivity remains the same.

This distinction is significant in chemistry because different isomers can exhibit varied chemical and physical properties despite having the same number and types of atoms in their molecular formula. Understanding isomerism is crucial because it plays a vital role in the behavior and reactivity of chemical compounds, impacting everything from the synthesis of new materials to biological processes.

The other choices describe different concepts not accurately defining isomers. Some might pertain to characteristics of compounds, but only option C captures the essence of isomerism.

Get further explanation with Examzify DeepDiveBeta

Compounds that differ only by their phase of matter

Next Question

Report this question

Download American Chemical Society (ACS) Chemistry Practice Exam PDF Study Guide
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy