The conjugate base of $HCO_3^-$ is

The conjugate acid of $(A)$ is

According to the Bronsted-Lowry concept,an acid is a substance which:

Which of the following is not a Lewis acid?

The conjugate acid of $S_2O_8^{2-}$ is

Which two sets of reactants best represent the amphoteric character of $Zn(OH)_2$?
Set $1$ : $Zn(OH)_{2(s)}$ and $OH^{-}_{(aq)}$
Set $2$ : $Zn(OH)_{2(s)}$ and $H_2O_{(l)}$
Set $3$ : $Zn(OH)_{2(s)}$ and $H^{+}_{(aq)}$
Set $4$ : $Zn(OH)_{2(s)}$ and $NH_{3(aq)}$