Question

What is the chemical formula of hydrogen chloride?

• A. $HCl$
• B. $H_{2}Cl$
• C. $HC{l}_2$
• D. $HC{l}_3$

Answer 1

Answer: (A)

$HCl$

The valencies of both hydrogen and chlorine are 1. When we cross-multiply the valencies, we get $H_{1}C{l}_1$. So, we can write the chemical formula as $HCl$.

$H$ $Cl$

$1$ $\times$ $1$

$H_{1}C{l}_1$

$HCl$