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Standard XII
Chemistry
Pauli's Exclusion Principle
In a set of d...
Question
In a set of degenerate orbitals, electrons distribute themselves to retain similar spins as far as possible. This statement is attributed to:
A
Pauli' s principle
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B
Hund' s rule
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C
Aufbau rule
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D
Slater' s rule
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Solution
The correct option is
B
Hund' s rule
Hund’s rule says that all electrons must be singly filled in orbitals before pairing up.
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Assertion :The ground state electronic configuration of nitrogen is as shown in diagram Reason: Electrons are filled in orbitals as per aufbau principle, Hund's rule of maximum spin multiplicity and Pauli's principle.
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Assertion :An orbital cannot have more than two electrons and they must have opposite spins. Reason: No two electrons in an atom can have same set of all the four quantum numbers as per Pauli's exclusion principle.
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According to Pauli's exclusion principle the two electrons in the same orbital will have parellel spins.
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