MCQ
Which of the following is paramagnetic
- A${N_2}$
- B${C_2}$
- ✓$N_2^ + $
- D$O_2^{2 - }$
${C_2}:KK\sigma{(2s)^2}\sigma*{(2s)^2}\pi {(2{p_x})^2}\pi {(2{p_y})^2}$ (diamagnetic)
$N_2^ + :KK\sigma{(2s)^2}\sigma*{(2s)^2}\pi {(2{p_x})^2}\pi {(2{p_y})^2}\sigma {(2{p_z})^2}$ (paramagnetic)
$O_2^{2 - }:KK\sigma{(2s)^2}\sigma*{(2s)^2}\sigma^* {(2{p_z})^2}\pi {(2{p_x})^2}\pi {(2{p_y})^2}$
$\pi *{(2{p_x})^2}\pi *{(2{p_y})^2}$ (diamagnetic)
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Given $\mathrm{R}=8.31\, \mathrm{~J} \,\mathrm{~K}^{-1} \,\mathrm{~mol}^{-1} ; \log 6.36 \times 10^{-3}=-2.19$ $\left.10^{-4.79}=1.62 \times 10^{-5}\right]$
[Given : $R :0.08314 \,L$ $bar$ $\,K ^{-1} \,mol ^{-1}]$