Question

3NH3po4 aqu. solution is given is gm/ lit

​

Answer 1

(IE)1​ of Li is highest in first group but it is best reducing agent in aqueous solution.

In first group, Li has smallest atomic size and hence, highest first ionization energy.

However it has high heat of hydration which more than compensates the ionization energy. This results in higher oxidation potential of lithium and greater ease with which the transformation Li(s)→Li+(aq)+e− occurs.

Hence, lithium is best reducing agent in aqueous solution.

Hence, the given statement is true

i hope it helpful for you