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Given below are two statements, one is labelled as assertion (A) and other is labelled as reason (R).
Assertion (A) : Diamagnetic C₂ molecule has been detected in vapour phase in which double bond consists of both Pi bonds
Reason (R) : In C₂ molecule four electrons are present in two Pi molecular orbitals

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If A is true but R is false

If both A and R are false

If both A and R are true and R is the correct explanation of A

If both A and R are true but R is not the correct explanation of A

answer is A.

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Detailed Solution

Number of electrons in C₂ is 12 and its electronic configuration is $σ 1 s^{2}, σ^{*} 1 s^{2}, σ 2 s^{2}, σ^{*} 2 s^{2}, (π 2 p_{x}^{2} = π 2 p_{y}^{2})$

Due to the presence of 4 electrons in pi-bonding orbitals, two pi-bond are present.

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