NEET Chemistry: Hund's rule Practice Questions

Q1. Consider the three p-orbitals (pₓ, p_y, p_z). If three electrons are placed in these orbitals, how should they arrange themselves according to Hund's rule?

• AAll three electrons must occupy the same orbital simultaneously.
• BTwo electrons in pₓ and one in p_y.
• CTwo electrons paired in pₓ and one in p_y.
• DOne electron in each orbital with the same spin.

Q2. In a set of three degenerate orbitals (e.g., p-orbitals), how would the maximum multiplicity be achieved by electrons according to Hund's rule?

• ATwo electrons paired in the same orbital.
• BElectrons distributed randomly across the orbitals.
• COne electron in each orbital with parallel spins.
• DTwo electrons in one orbital and one in another.

Q3. According to Hund's rule, when electrons are filling degenerate orbitals, they prefer to occupy the orbitals in a manner that maximizes which property?

• AExchange energy
• BSpin multiplicity
• COrbital energy minimization
• DTotal orbital angular momentum

Q4. According to Hund's rule, how are the electrons distributed among the orbitals of a subshell?

• AThey fill all orbitals equally, regardless of spin.
• BThey occupy separate orbitals with parallel spins.
• CThey pair up in the lowest energy orbitals first.
• DThey fill the highest energy orbitals first.

Q5. In the filling of d-orbitals, Hund's rule dictates that electrons should be distributed such that they all have parallel spins. This distribution leads to which characteristic?

• AMaximum orbital overlap
• BMaximum exchange energy
• CMinimum total energy
• DMaximum electron repulsion

Q6. Consider the three p-orbitals (pₓ, p_y, p_z) of a nitrogen atom. How should the three valence electrons be distributed among these orbitals according to Hund's rule?

• ATwo electrons in one orbital and one in another.
• BOne electron in each orbital with parallel spins.
• COne electron in each orbital with opposite spins.
• DTwo electrons in one orbital and one in a paired orbital.

Q7. The fundamental principle underlying Hund's rule is that the arrangement of electrons in degenerate orbitals leads to the lowest possible energy state because this arrangement results in:

• Aminimum exchange energy
• Bminimum Coulomb repulsion
• Cmaximum repulsion between electrons
• Dmaximum net spin

Q8. The maximum number of unpaired electrons that can exist in a set of n degenerate orbitals is:

• An/4
• B(n-1)/2
• Cn/2
• Dn

Q9. Which statement correctly describes the application of Hund's rule in filling the degenerate orbitals of a subshell?

• AElectrons must occupy separate orbitals with parallel spins before pairing up.
• BThe total spin of the system is always minimized when filling subshells.
• CElectrons will spread out equally across all available orbitals in a specific order.
• DElectrons prefer to pair up in the lowest energy orbitals first.

Q10. In an atom with three orbitals, if there are four electrons to be placed, what is the arrangement that obeys Hund's rule?

• AThe electrons occupy the orbitals in the order 1, 1, 1, 1
• BOne orbital has two electrons, and the other two have zero electrons
• CAll three orbitals have one electron each, and the fourth electron enters the next available orbital
• DTwo orbitals have one electron each, and the third orbital has two electrons

Q11. In a set of degenerate orbitals, Hund's rule dictates that electrons will preferentially occupy these orbitals in a manner that results in:

• AMaximum number of unpaired electrons
• BMaximum spatial separation
• CMinimum number of unpaired electrons
• DMaximum energy of the system

Q12. In a set of degenerate orbitals, which configuration results in the maximum total spin multiplicity?

• AElectrons are distributed randomly across the orbitals.
• BAll electrons are paired in the lowest energy orbitals.
• COne orbital has two paired electrons and one empty orbital.
• DAll electrons occupy separate orbitals with parallel spins.

Q13. In a p-subshell (three degenerate orbitals), what is the arrangement of electrons according to Hund's rule when filling them?

• AAll electrons paired up
• BElectrons filling sequentially from the lowest energy level
• COne electron in each orbital with parallel spins
• DTwo electrons in one orbital and one in another

Q14. Which rule dictates the way electrons fill degenerate orbitals within a subshell?

• APauli Exclusion Principle
• BHund's Rule
• CHeisenberg Uncertainty Principle
• DAufbau Principle

Q15. Which of the following statements accurately describes the application of Hund's rule in filling atomic orbitals?

• Ac electrons are distributed randomly across all available orbitals
• Ba system must fill lower energy orbitals first
• Cd only the lowest energy orbital is filled first
• Db electrons will occupy degenerate orbitals singly with parallel spins before pairing up