1.

Set containing isoelectronic species is/are

Answer»

`C_(2)^(2-), NO^(+), CN^(-), O_(2)^(2+)`
`CO, NO, O_2, CN`
`CO_2, NO_2, O_2, N_2O_5`
`CO,CO_2, NO, NO_2`

SOLUTION :`C_(2)^(2-) (12 + 2) , NO^(+) (7 + 8 - 1), CN^(-) (6 + 7 + 1)` and `O_(2)^(2+) (16 - 2)` are all isoelectronic SPEICES.


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