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O(2) undergoes photochemical dissociatio...

`O_(2)` undergoes photochemical dissociation into `1` normal oxygen atom `(O)` and more energetic oxygen atom `O^(**)`. If `(O)` has `1.967 eV` more energy than `(O)` and normal dissociation energy of `O_(2)` is `498 kJ mol^(-1)`, what is the maximum wavelength effective for the photo chemical dissociation of `O_(2)`?

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The correct Answer is:
`1740.2Å`
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