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 correctA. (iv) and (iii)B. (i),(ii) and (iv)C. (i),(ii) and (iii)D. None of these

Answer» Correct Answer - D
(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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