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Q.

Which of the following option with respect to increasing bond dissociation energies is correct ?

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a

He2+ < O2- < NO < C2

b

He2+ < O2- < C2 < NO

c

NO < C2 < O2- < He2+

d

C2 < NO < He2+ < O2-

answer is D.

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Detailed Solution

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He2+ bond order = 2-12=12; O2- bond order = 10-72=1.5 C2 bond order = 8-42=2; NO bond order = 10-52=2.5 Bond order  bond dissociation energy.

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