Question

Which one of the following is an incorrect statement?
A. The ionization potential of nitrogen is greater than that of oxygen
B. The electron affinity of fluorine is greater than that of chlorine.
C. The ionization potential of beyllium is greater than that of boron.
D. The electronegativity of fluorine is greater than that of chlorine.

Answer 1

Correct Answer - B
On account of quite small size of `F` (relative to that of `C1`), the incoming electron experiences quite large `e^(-)-e^(-)` repulsion and hence, the electron gain enthalpy of `F` is less negative than that of `C1: C1 (-349 kJ mol^(-1))gt F (-333)`.