Question

A pure substance can be:

• A. an element only
• B. a compound only
• C. either element or compound
• D. any substance

Answer 1

The correct option is C

either element or compound

Concept explanation:

Option (C)

Pure substances will be substances that are comprised of just a single kind of molecule and have a fixed or consistent construction.

Pure substances can be classified as components and mixtures.

An element is a substance that comprises just a single kind of molecule. It cannot be separated or changed into another substance even by utilizing a few physical or chemical methods. Elements can be metals, non-metals, or metalloids. For example, sodium $\left(\mathrm{Na}\right)$, Lithium $\left(\mathrm{Li}\right)$, Potassium $\left(\mathrm{K}\right)$, etc.

Compounds, then again, are likewise pure substances when at least two components are consolidated chemically in a fixed proportion. These substances can be separated into their constituents (elements) by chemical methods. For example, water $\left({\mathrm{H}}_2\mathrm{O}\right)$, carbon dioxide $\left({\mathrm{CO}}_2\right)$, etc.

Final answer: A pure substance can be either element or a compound i.e option (C)