Q.

A filled or half filled set of p- or d- orbitals is spherically symmetric. Point out the species which has spherically symmetry

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a

Na

b

C

c

Fe

d

Cl

answer is D.

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Detailed Solution

 Na configuration is [Ne]3s1       s orbital is half filled 
C configuration is 1s2 2s2 2p    p orbital is not half filled and full filled
Cl- configuration is 1s2 2s2 2p5 3s2     p orbital is not half filled and full filled
Fe configuration is [Ar]3d6 4s2       d orbital is not half filled and full filled
Therefore,  Na is spherically symmetric

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