Question

17. Form similar pairs of words.

v. Sodium chloride and ________ / hydrogen chloride and $\mathrm{HCl}$

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 of the compound Hydrogen chloride is $\mathrm{HCl}$.
• So, the formula of Sodium chloride is $\mathrm{NaCl}$. $\mathrm{NaCl}$ is made up of one atom of sodium $\left(\mathrm{Na}\right)$ and one atom of chlorine $\left(\mathrm{Cl}\right)$.

Hence, Sodium chloride and $\mathrm{NaCl}$ / Hydrogen chloride and $\mathrm{HCl}$.