Rearrange the following sentences to form a coherent paragraph:
1. Molecular structure is a fundamental concept in chemistry that describes the three-dimensional arrangement of atoms in a molecule.
2. These differences can significantly alter the physical and chemical properties of the substance, a concept known as isomerism.
3. It is typically represented by structural formulas, which illustrate the connectivity between atoms.
4. However, molecules with the same chemical formula can have different arrangements of atoms in space.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 1, 3, 4, 2
Sentence 1 comes first because it introduces the main idea of molecular structure.
Sentence 3 follows because it explains how molecular structure is represented, so it directly builds on sentence 1.
Sentence 4 introduces a contrast using “However,” showing that molecules with the same formula can still differ in structure, which naturally follows the basic concept.
Sentence 2 comes last because it explains the result of these differences, i.e., changes in properties and the concept of isomerism, making it a conclusion.