The $H^{+}$ ion is a ...... .

What is the nature of an aqueous solution of ammonia?

The strongest base from the following species is

Which of the following statements is correct?

The $K_{a}$ values of $A$,$B$,and $C$ are $1.8 \times 10^{-4}$,$5 \times 10^{-10}$,and $3 \times 10^{-8}$ respectively. The correct order of their acidic strength is

Which of the following species can act as a Bronsted-Lowry acid as well as a Bronsted-Lowry base?