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Chemical Bonding and Molecular Structure

Which of the following is paramagnetic in nature?

Question

Medium

Solving time: 3 mins

Which of the following is paramagnetic in nature?

A

C_{2}

B

O_{2}^{2 -}

C

B_{2}

D

N_{2}

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Updated on: Apr 3, 2023

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Which of the following is paramagnetic in nature?

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Text solutionVerified

If the atom, ion or molecule has unpaired electrons, then the substance is paramagnetic.

C_{2} : KK σ 2 s^{2}, σ^{*} 2 s^{2}, π 2 p_{x}^{2} = π 2 p_{y}^{2}

It has all the electrons paired, hence it is diamagnetic.

O_{2}^{2 -} : KK σ 2 s^{2}, σ^{*} 2 s^{2}, σ 2 p_{z}^{2}, π 2 p_{x}^{2} = π 2 p_{y}^{2}, π^{*} 2 p_{x}^{2} = π^{*} 2 p_{y}^{2}

It has all the electrons paired, hence it is diamagnetic.

B_{2} : KK σ 2 s^{2}, σ^{*} 2 s^{2}, π 2 p_{x}^{1} = π 2 p_{y}^{1}

It has unpaired electrons in antibonding

π -

orbital and hence, it is paramagnetic.

N_{2} : KK σ 2 s^{2}, σ^{*} 2 s^{2}, π 2 p_{x}^{2} = π 2 p_{y}^{2}, σ 2 p_{z}^{2}

It has all the electrons paired, hence it is diamagnetic.
Hence,

B_{2}

is paramagnetic.

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Question Text	Which of the following is paramagnetic in nature?
Updated On	Apr 3, 2023
Topic	Chemical Bonding and Molecular Structure
Subject	Chemistry
Class	Class 11
Answer Type	Text solution:1 Video solution: 6
Upvotes	693
Avg. Video Duration	5 min