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If the bond dissociation energies of XY,...

If the bond dissociation energies of `XY,X_(2)` and `Y_(2)(` all diatomic molecules `)` are in the ratio `1:1:0.5` and `Delta_(f)H` of `XY` is `-200 kJ mol^(-1)`. The bond dissociation energy of `X_(2)` will be `:`

A

`"100 kJ mole"^(-1)`

B

`"800 kJ mole"^(-1)`

C

`"300 kJ mole"^(-1)`

D

`"400 kJ mole"^(-1)`

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The correct Answer is:
B
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