`underset((X))(K_(6)[(CN)_(5)" "Co-O-O-Co(CN)_(5)])overset("oxidizes")rarrunderset((Y))(K_(5)[(CN)_(5)Co-O-O-Co(CN)_(5)])`
In both the complexes Co have `t_(20)""^(6)e_(g)^(@)` configuration.
The bond energy of `(O-O)` in X ans Y is `:`

Options

A. bond energy of `(O-O)` in `Y lt` bond energy of `(O-O)` in X.
B. bond energy of `(O-O)` in `X lt` bond energy of `(O-O)` in Y.
C. bond energy of `(O-O)` in `X=` bond energy of `(O-O)` in Y.
D. bond energy of `(O-O)` in X and bond energ of `(O-O)` in Y can't be comparable.

Answer

2

Explanation

`K_(6)[(overset(-5)(C)N)_(5)Co(III)-Ooverset(-2)(_)O-Co(III)(overset(-5)(CN))]^(6+)overset("oxidizes")rarrK_(5)[(overset(-5)(CN))_(5)Co-Ooverset(-1)(-)O-Co(overset(-5)(CN))_(5)]^(5+)`
`o_(2)^(-)overset("oxidized")rarrO_(2)^(-),` bond order of `O_(2)^(2-)=(10-8)/(2)=1,` bond orderof `O_(2)^(-)=(10-7)/(2)=1.5`
Bond strength `prop` bond order `,` so, Bond energy of `O_(2)^(2-) lt` Bond energy of `O_(2)^(-)`.