MHT CET 2025 Chemistry question
"Pairing of electrons in the orbitals belonging to the same subshell does not occur unless each orbital belonging to that subshell has got one electron each." This statement is known as
Answer: (B)
Solution
The statement describes Hund's rule of maximum multiplicity: in a set of degenerate orbitals (same subshell), electrons first occupy the orbitals singly with parallel spins, and pairing begins only after every orbital holds one electron. Hence option (B). Pauli's exclusion principle says no two
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