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AB, A(2) and B(2) are diatomic molecule...

`AB, A_(2) and B_(2)` are diatomic molecules. If the bond enthalpies of `A_(2), AB, and B_(2)` are in the ratio 1 : 1 : 0.5 and the enthalpy of formation of AB from `A_2` is `-100 kJ mol^(-1)`, what is the bond enthalpy of `A_(2)` in kJ ?

A

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

B

`200 kJ"mol"^(-1)`

C

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

D

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

Text Solution

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The correct Answer is:
B
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