$($B$)C_5{H}_{4}N$ and $H_{2}C{O}_3{C}_5{H}_{5}N{H}^{+}$and $HC{O}_3$

$($C$)C_5{H}_{5}N{H}^{+}$and $HC{O}_3^{-}{C}_5{H}_{5}N$ and $H_{2}C{O}_3$

$($D$)C_5{H}_{5}N{H}^{+}$and $H_{2}C{O}_3$

$C_5{H}_{5}N$ and $HC{O}_3^{-}$

$33.$ Which set represents a conjugate acid$/$base pair?

$($A$)H_{2}P{O}_4^{-}$and $HP{O}_4^{2-}$

$($B$)H_{2}P{O}_4^{-}$and $H_{2}P{O}_3^{-}$

$($C$)H_{2}P{O}_4^{-}$and $H_{2}P{O}_4^{3-}$

$($D$)H_{3}P{O}_4$ and $N{a}_{3}P{O}_4$

$34.$ For the reaction:

$N{H}_3(aq)+N_2{H}_5^{+}(aq)N{H}_4^{+}(aq)+N_2{H}_4(aq)$

Which statement is true?

$($A$)N_2{H}_5^{+}(aq)$ is a Bronsted$-$Lowry acid and a Lewis acid.

$($B$)N_2{H}_5^{+}(aq)$ is a Bronsted$-$Lowry acid and a Lewis base.

$($C$)N_2{H}_5^{+}(aq)$ is a Bronsted$-$Lowry base and a Lewis acid.

$($D$)N_2{H}_5^{-}($aq$)$ is a Bronsted$-$Lowry base and a Lewis base.