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Q.

Calculate bond energy of X-X bond from the following data 

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a

200 kJ 

b

400 kJ 

c

100 kJ

d

150 kJ

answer is A.

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Detailed Solution

For the structure, we have

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ΔHRxn=−200−300+100=−400kJ/mole

=BE(X−X)−2BE(X−X) ⇒BE(X−X)−2BE(X−X)

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