Question
Chemistry Question on Mole concept and Molar Masses
The bond dissociation energies of X2 , Y2 and XY are in the ratio of 1 : 0·5 : 1. ΔH for the formation of XY is – 200 kJ mol–1 . The bond dissociation energy of X2 will be
A
200 kJ mol–1
B
800 kJ mol–1
C
100 kJ mol–1
D
400 kJ mol–1
Answer
800 kJ mol–1
Explanation
Solution
The correct option is (B) :800 kJ mol–1.