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JIPMER 2004

Exam: JIPMER
Year: 2004
Subject: Chemistry
Chapter: Chemical Bonding and Molecular Structure

JIPMER 2004 · Chemistry · Chemical Bonding and Molecular Structure

Which of the following is paramagnetic?

Which of the following is paramagnetic?

Options

ACO
B $\mathrm{N}_2$
C $\mathrm{O}_2$
D $\mathrm{H}_2 \mathrm{O}_2$

Correct answer

C. $\mathrm{O}_2$

Step-by-step solution

Oxygen

\left(\mathrm{O}_2\right)

contains 2 unpaired electron, hence it is paramagnetic

\begin{aligned}& \mathrm{O}_2=\sigma 1 s^2 \sigma^* 1 s^2 \sigma 2 s^2 \sigma^* 2 s^2 \sigma 2 p_x^2 \& \pi 2 p_y^2 \pi 2 p_z^2 \pi^* 2 p_y^1 \pi^* 2 p_z^1\end{aligned}

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