For a concentrated solution of a weak electrolyte ($$\mathrm{K}_{\text {eq }}=$$ equilibrium constant) $$\mathrm{A}_{2} \mathrm{B}_{3}$$ of concentration '$$c$$', the degree of dissociation '$$\alpha$$' is :

Match List I with List II

Choose the correct answer from the options given below:

The difference between electron gain enthalpies will be maximum between :

The major product formed in the following reaction is