Exchange energy is the energy obtained when two electrons in the ________ exchange.
Degenerate orbitals with same spin.
Non-degenerate orbitals with same spin.
Degenerate orbitals with opposite spin.
Non-Degenerate orbitals with opposite spin.
Electrons with same spin in degenerate orbitals can exchange easily as the energy barrier is less. However, for the other conditions the energy increases and no exchange can happen.
Hence option 1 is correct.