In which of the following, the double bond consists of both $p i$ bond?

O_{2}

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C_{2}

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{B e}_{2}

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S_{2}

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Solution

The correct option is B $C_{2}$

$C_{2} (12) σ 1 s^{2} σ^{} 1 s^{2} σ 2 s^{2} σ^{} 2 s^{2} Π 2 p_{x}^{2} = Π 2 p_{y}^{2}$
(Refer to Image)
This MO of $C_{2}$ shows that there are two sets of paired $e^{-} s$ in a degenerate $Π$ bonding set of orbitals.

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In which of the following, the double bond consists of both pi bond?

The correct option is B C2C2(12)σ1s2σ∗1s2σ2s2σ∗2s2Π2p2x=Π2p2y(Refer to Image)This MO of C2 shows that there are two sets of paired e−s in a degenerate Π bonding set of orbitals.

In which of the following, the double bond consists of both $p i$ bond?

The correct option is B $C_{2}$

$C_{2} (12) σ 1 s^{2} σ^{} 1 s^{2} σ 2 s^{2} σ^{} 2 s^{2} Π 2 p_{x}^{2} = Π 2 p_{y}^{2}$
(Refer to Image)
This MO of $C_{2}$ shows that there are two sets of paired $e^{-} s$ in a degenerate $Π$ bonding set of orbitals.