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Question

Which is correct order for bond energy?

A
N2>HF>O2>H2
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B
N2>O2>HF>H2
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C
N2>H2>O2>HF
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D
HF>N2>O2>H2
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Solution

The correct option is A N2>HF>O2>H2

The correct order for bond energy is N2>HF>O2>H2.

Nitrogen molecule contains triple bond thus have highest bond energy followed by oxygen which contains double bond , then hydrogen which contains single bond.But bond energy of HF which contains single bond is higher than O2 due to large difference of electronegativity between hydrogen and fluorine atom.

B.E; N2>HF>O2>H2
kcal/mol 225.08>134.6>118.32>1.4.18


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