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Assertion: B2 molecule is diamagnetic.

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Assertion: B2 molecule is diamagnetic.

Reason: The highest occupied molecular orbital is of σ type.

(a) If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

(b) If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

(c) If the Assertion is correct but Reason is incorrect.

(d) If both the Assertion and Reason are incorrect.

(e) If the Assertion is incorrect but the Reason is correct.

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(d) If both the Assertion and Reason are incorrect.

Explanation:

B2 molecule has no of electrons = 10

Molecular orbital configuration

σ(1s)2,σ*(1s)2 ,σ(2s)2 σ*2(s)2x  π2p1x, π2p1y

Due to unpaired electron, it is paramagnetic.

The highest occupied MO is of π-type.

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