Carbon monoxide and chlorine gas react to form phosgene: co( g) + cl2( g) ∆ cocl2( g) kp = 3.10 at 700 k if a reaction mixture initially contains 215 torr of co and 245 torr of cl2, what is the mole fraction of cocl2 when equilibrium is reached?

the electronic configuration of an atom with eight electrons is 1s²2s²2p⁴. the orbital diagrams are shown in the figure.

as per the hunds rule:

1. electrons tend to avoid being in the same orbital as per as practicable.

2. electrons in different orbitals of the same energy will have their spin parallel.

this can be illustrated from the multiplicity of the orbitals of the atom. as there are four electrons in the p orbital and p orbital has 3 sub-shells. the electrons can be fed in different ways as shown in the figure but the correct orbital diagram will be as per the hunds rule.

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the answer is option a.