Chemistry - Chemical Equilibrium Question with Solution | TestHub

Assertion : If ${\mathrm{K}}_1,{\mathrm{K}}_2$ and ${\mathrm{K}}_3$ are $1^{\text{st }}$, $2^{\text{nd }}$ and $3^{\text{rd }}$ dissociation constants of a polyprotic acid respectively, then their values decrease in the order ${\mathrm{K}}_1>{\mathrm{K}}_2>{\mathrm{K}}_3$.

Reason : The [H⁺] furnished in first step of dissociation exerts common ion effect to reduce the second dissociation and so on.