The number of dissociable protons in "orthophosphoric acid" is

The dissociation of $H_3PO_4$ takes place in how many steps?

When $K_2O$ is added to water,the solution becomes basic because it contains the concentration of which of the following?

Among the following,the dissociation constant $(K_a)$ is highest for:

The first and second dissociation constants of an acid $H_2A$ are $1.0 \times 10^{-5}$ and $5.0 \times 10^{-10}$ respectively. The overall dissociation constant of the acid will be

The strongest conjugate base among the following is: