1.

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

Answer»

100kJ `mol ^(-1)`
800KJ `mol ^(-1)`
`300kJ` `mol ^(-1)`
`400KJ` `mol ^(-1)`

ANSWER :B


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