Question

17. Form similar pairs of words.

iii. $\mathrm{PbO}$ and lead oxide / ______ and lead sulfide

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 compound Lead oxide is $\mathrm{PbO}$.
• So, the formula for compound Lead sulfide is $\mathrm{PbS}$. $\mathrm{PbS}$ is made up of one atom of lead $\left(\mathrm{Pb}\right)$ and one atom of sulfur $\left(\mathrm{S}\right)$.

Hence, $\mathrm{PbO}$ and Lead oxide / $\mathrm{PbS}$ and Lead sulfide.