You have a mixture of the benzoic acid and benzophenone (1g, 50:50 by weight) and expected to separate the mixture by extraction by using pH based method. Explain in detail how you would separate the two.

The problem here is that according to aufbau principle before 3d orbital 4s subshell comes.after filling 3p orbital with electrons you have 4 electrons left, you place two in 4s with opposite spin and the other two in 3d in any of its two orbitals of total five orbitals with the same spin.