Question

A substance that is composed of two or more elements, chemically combined with one another in a fixed proportion is called a ____.

• A. compound
• B. element
• C. mixture
• D. Solution

Answer 1

The correct option is A

compound

Compounds are pure substances formed from two or more elements through a chemical combination.

For example, $NaCl$ is a compound. It is formed when $HCl$ reacts with $NaOH$.

$HCl+NaOH\to NaCl+H_{2}O$