Question

What is the conjugate base of $O{H}^{-}$ ?

• A. $O^{2-}$
• B. $O^{-}$
• C. $H_{2}O$
• D. $O_2$

Answer 1

Answer: (A)

Conjugate base is formed by loss of $H^{+}$.
$O{H}^{-}\to \underset{\text{Conjugate base}}{O^{2-}+H+}$
$O^{2-}$ is the conjugate base of $O{H}^{-}$.