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

On dissolving $1 \ mole$ of each of the following acids in $1 \ L$ of water,the acid which does not give a solution of strength $1 \ N$ is:

Which one of the following is a Bronsted acid but not a Bronsted base?

For any diprotic acid of the type $H_2A$,the relationship between the first $(Ka_1)$ and second $(Ka_2)$ ionization constants is:

Classify the following species into Lewis acids and Lewis bases and show how these act as Lewis acid/base:
$(a) OH^{-}$
$(b) F^{-}$
$(c) H^{+}$
$(d) BCl_{3}$

Ammonia gas dissolves in water to give $NH_4OH$. In this reaction,water acts as: