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Q.

The orbital diagram in which ‘Aufbau’s principle’ is violated?

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a

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b

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c

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d

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answer is B.

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Detailed Solution

The Aufbau’s principle states that in the ground state of an atom or ion, electrons must fill in atomic orbitals of lowest energy levels first. Ex:1s shell is filled first than 2s subshell is occupied.

Note: Each orbital can accommodate maximum for two electrons. 

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