MCQ
Which of the following is paramagnetic
  • A
    ${N_2}$
  • B
    ${C_2}$
  • $N_2^ + $
  • D
    $O_2^{2 - }$

Answer

Correct option: C.
$N_2^ + $
(c) ${N_2}:KK\sigma{(2s)^2}\sigma*{(2s)^2}\pi {(2{p_x})^2}\pi {(2{p_y})^2}\sigma {(2{p_z})^2}$ (diamagnetic)

${C_2}:KK\sigma{(2s)^2}\sigma*{(2s)^2}\pi {(2{p_x})^2}\pi {(2{p_y})^2}$ (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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