1.

Peroxide ion....... (i) Has five completely filled antibonding molecular orbitals (ii) Is diamagnetic (iii) Has bond order one (iv) Is isoelectric with neon Which one of these is correct

Answer»

(iv) and (iii)
(i),(ii) and (iv)
(i),(ii) and (iii)
NONE of these

Solution :(None of the given options is correct)
Peroxide ion is `O_(2)^(2-)`
TOTAL electrons=18
E.c.=`sigma1s^(2)sigma^(**)1S^(2)sigma2s^(2)sigma^(**)2S^(2)sigma(2p_(X))^(2)pi (2p_(y))^(2)`
`pi^(**)(2p_(x))^(2)pi^(**)(2p_(y))^2`
`B.O. =(10-8)/2=1`
options (ii) and (iii) are correct.


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