Chemistry - Complete d-block Question with Solution | TestHub

The correct option is (A).

Successive ionization energies always increase for any given element ($I{P}_1<I{P}_2<I{P}_3$).

Removing an electron from a positively charged cation requires significantly more energy due to an increased effective nuclear charge.

Therefore, the first ionization potential ($I{P}_1$) of Manganese (Mn) must be less than its second ionization potential ($I{P}_2$).

This makes statement (A) completely false, and thus it is the correct answer for the incorrect statement.