A) Ionic radius of \[\text{F}{{\text{e}}^{\text{3+}}}\]is greater than \[\text{F}{{\text{e}}^{\text{2+}}}\]
B) Atomic radius of chlorine atom is greater than the ionic radius of chloride ion
C) Electron affinity of phosphorus is greater than nitrogen
D) \[\text{C}{{\text{s}}_{\text{2}}}\text{O}\]is strongly acidic in nature
Correct Answer: C
Solution :
\[_{7}N=1{{s}^{2}},2{{s}^{2}},2{{p}^{3}}\] \[_{15}P=1{{s}^{2}},2{{s}^{2}},2{{p}^{6}},3{{s}^{2}},3{{p}^{3}},3{{d}^{0}}\] In P, vacant d-orbitals are present. In the excited state, one electron from 3s-orbital jumps into 3d-orbital. Therefore, its electron affinity is high. On the other hand, the p-orbital is of N is half-filled, therefore it behaves like inert. Hence, its electron affinity is negligible.
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