Question

Triad-I : $[N^{3-},O^{-},N{a}^{+}]$

Triad-II : $[N^{+},C^{+},O^{+}]$

Choose the species of lowest ionization potential from triad-I and highest IP from triad-II respectively.

• A. $N^{3-},O^{+}$
• B. $N{a}^{+},C^{+}$
• C. $N^{3-},N^{+}$
• D. $O^{-},O^{+}$

Answer 1

The correct option is A $N^{3-},O^{+}$

In the triad I, $N^{3-}$ has lowest ionization potential due to larger atomic size and lower effective nuclear charge.
In the triad II, $O^{+}$ has highest ionization potential due to increased nuclear charge and decreased size.