PART - 2 CH - 8 Organic Chemistry: Some Basic Principles and Techniques — Chemistry STD 11 Science — Question

($A$) $\mathrm{C}_2^{2-}$ is expected to be diamagnetic

($B$) $\mathrm{O}_2{ }^{2+}$ is expected to have a longer bond length than $\mathrm{O}_2$

($C$) $\mathrm{N}_2^{+}$and $\mathrm{N}_2^{-}$have the same bond order

($D$) $\mathrm{He}_2^{+}$has the same energy as two isolated He atoms

$N_2H_5 ^+ + NH_3$ $\rightleftharpoons $ $NH_4^+ + N_2H_4$

$NH_3 + HBr $ $\rightleftharpoons $ $NH_4^+ + Br^-$

$N_2H_4 + HBr$ $\rightleftharpoons $ $N_2H_5^+ + Br^-$

Based on this information, what is the order of acidic strength -