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Total number of species which has/ have ...

Total number of species which has/ have symmetrical electronic distribution in their HOMO and also paramagnetic.
`N_(2)^(+), O_(2)^(2-), C_(2), O_(2), B_(2), C_(2)^(2-), N_(2)^(2-)`.

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The correct Answer is:
4
`N_(2)^(+), O_(2), B_(2), N_(2)^(2-)` have symmetrical electronic distribution in their HOMO and are also paramagnetic.
`N_(2)^(+)` paramagnetic and symmetrical electronic distribution in their HOMO.
`O_(2)` paramagnetic and symmetrical electronic distribution in their HOMO.
`B_(2)` paramagnetic and symmetrical electronic distribution in their HOMO.
`N_(2)^(2-)` paramagnetic and symmetrical electronic distribution in their HOMO.
`O_(2)^(2-)` diamagnetic and symmetrical electronic distribution in their HOMO.
`C_(2)` diamagnetic and symmetrical electronic distribution in their HOMO.
`C_(2)^(2-)` diamagnetic and symmetrical electronic distribution in their HOMO.
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