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The bond dissociation energies of X2, Y2...

The bond dissociation energies of `X_2, Y_2 and XY` are in the ratio of `1 : 0.5 : 1. DeltaH` for the formation of XY is -200 kJ mol^(-1)`. The bond dissociation energy of `X_2` will be

A

`100 KJ//mol`

B

`400 KJ//mol`

C

`600 KJ//mol`

D

`800 KJ//mol`

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The correct Answer is:
D
`N//A`
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