\({H_2}Te > {H_2}Se > {H_2}S > {H_2}O\)
\(N{a_2}O\) is a salt of \(NaOH + {H_2}O\)and \({H_2}O\) is least acidic among given acidshence \(pH\) in this case will be \({\max ^m}\).
$(a)$ $H _{2} C _{2} O _{4} \rightleftharpoons H ^{+}+ HC _{2} O _{4}^{-}$
$(b)$ $HC _{2} O _{4}^{-} \rightleftharpoons H ^{+}+ HC _{2} O _{4}^{2-}$
$(c)$ $H _{2} C _{2} O _{4} \rightleftharpoons 2 H ^{+}+ C _{2} O _{4}^{2-}$
$K _{ a _1}, K _{ a _2}$ અન $K _{ a _3}$ વચ્ચેનો સંબંધ એ નીચે આપેલ છે તે શોધો.