Question

Electrovalency of non-metal atom is not equal to that of the metal atom in:

• A. sodium bromide
• B. magnesium oxide
• C. aluminium nitride
• D. potassium sulphide

Answer 1

The correct option is D potassium sulphide

In Potassium sulphide, $K_{2}S$, electrovalency of $K$ is $1$ and of $S$ is$2.$

In Sodium Bromide, $NaBr$, electrovalency of $Na$ and $Br$ is$1.$
In Magnesium oxide, $MgO$, electrovalency of $Mg$ and $O$ is $2.$
In Aluminium nitride, $AlN$, electrovalency of $Al$ and $N$ is $3.$