Aufbau Principle, Pauli's Exclusion Principle and Hund's Rule — Prelims Questions

Which of the following electron configurations violates Hund's Rule of Maximum Multiplicity?

What is the correct order of filling of electrons in the following orbitals according to the Aufbau principle and $(n+l)$ rule: $4p, 5s, 4d, 5p$?

According to Pauli's Exclusion Principle, what is the maximum number of electrons that can be accommodated in a subshell with $l=2$?

An atom has 15 electrons. What is its correct ground state electron configuration?

Which of the following sets of quantum numbers is NOT allowed for an electron in an atom?

How many unpaired electrons are present in a Manganese (Mn) atom in its ground state? (Atomic number of Mn = 25)