Q.

Accroding to Molecular orbital theory, a molecule of H2 has two electrons in

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a

σ 4s

b

σ3s

c

σ 2s

d

σ 1s

answer is D.

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Detailed Solution

H2 = Total number of electrons  = 1 + 1 = 2e-s [≤ 14 e-s]σ1s2 σ*1s0;B.O=Nb-Na2B·O=2-02=1In H2 molecule two electrons  are present in σ1smolecular orbital.
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