Published by:
CGP EDU Academic Team
Published on: August 14, 2026
If the bond dissociation energies of 
and 
(all diatomic molecules) are in the ratio of 
and 
for the formation of 
is 
. The bond dissociation energy of 
will be
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Let the bond dissociation energy of XY, X2 and Y2 be x,x and x, 
KJ/mol respectively,
XY; Δ H ƒ = – 200 KJ mol–1.
H reaction = [(sum of bond dissociation energy of all reactants) – (sum of bond dissociation energy of all product)]
= 
= 
– x = – 200
x = 
= 800 KJ mol–1.
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