Q.

Which of the following is correct order of σ-bond strength ?(I) 2s - 2s (II) 2s -2p (III) 2p -2p (IV) 3s - 3s

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a

I> II> III> IV

b

III> II> I> IV

c

IV > I> II> III

d

III> I> II> IV

answer is B.

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Detailed Solution

Correct order 2p−2p>2s−2p>2s−2s>⏟ In same shell more the directional  character more will be strength of σ-bond 3s−3s
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Which of the following is correct order of σ-bond strength ?(I) 2s - 2s (II) 2s -2p (III) 2p -2p (IV) 3s - 3s