If the bond dissociation energies of XY, X2 and Y2 (all diatomic molecules) are in the ratio of 1:1: 0.5

If the bond dissociation energies of XY, X₂ and Y₂ (all diatomic molecules) are in the ratio of 1:1: 0.5 and Δ_fH for the formation of XY is -200kJ mole^-1. The bond dissociation energy of X₂ will be

(A) 100 kJmol^-1

(B) 800 kJmol^-1

(D) 400 kJmol^-1

If the bond dissociation energies of XY, X2 and Y2 (all diatomic molecules) are in the ratio of 1:1: 0.5

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