Question

17. Form similar pairs of words.

iv. ${\mathrm{CO}}_2$ and Carbon dioxide / ______ and water

Answer 1

• A compound is defined as a pure substance that is made up of two or more elements in a fixed ratio by mass.
• The formula for the compound Carbon dioxide is ${\mathrm{CO}}_2$.
• So, the formula of water is ${\mathrm{H}}_2\mathrm{O}$. ${\mathrm{H}}_2\mathrm{O}$ is made up of two atoms of hydrogen $\left(\mathrm{H}\right)$ and one atom of oxygen $\left(\mathrm{O}\right)$.

Hence, ${\mathrm{CO}}_2$ and Carbon dioxide / ${\mathrm{H}}_2\mathrm{O}$ and water