HOAE General Science Practice Test

Which of the following is an example of an inorganic molecular state of matter?

Salt Sugar Plastic Quartz

Correct Answer:

Quartz

Explanation:

The key idea is identifying substances that are not carbon-based. Organic compounds contain carbon-hydrogen bonds, which puts them in the organic category. Sugar and plastic are examples of organic materials because their structures are built from carbon-based molecules. Salt is inorganic, but it forms a lattice of ions rather than discrete molecules, so it’s not a molecular substance in the sense of separate, covalently bonded units. Quartz is silicon dioxide, a mineral where silicon and oxygen share a continuous network rather than individual molecules. This makes quartz a classic inorganic material, matching the idea of an inorganic molecular state of matter.

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