Question

Which of the following is NOT a divalent ion?

• A. Sulphate
• B. Nitrate
• C. Hydrogen phosphate
• D. Carbonate

Answer 1

The correct option is B Nitrate

Nitrate $\left(N{O}_3^{-}\right)$ is not a divalent ion. It is monovalent ion.

Sulphate $\left(S{O}_4^{2-}\right)$, hydrogen phosphate $\left(HP{O}_4^{2-}\right)$ and carbonate $\left(C{O}_3^{2-}\right)$ are divalent ions.

Hence, the correct option is $\text{B}$