Question

Assuming 2s – 2p mixing to be inoperative, the number of diamagnetic species among the following is

$B{e}_2^{+},B_2,C_2,N_2,NO,O_2,O_2^{–},F_2{,}^{–}CN,N{O}^{+}$

• A. Only $C_2,NO,O_2$
• B. Only $B_2,N_2,F_2{,}^{–}CN{,}^{+}NO$
• C. Only $C_2,NO,O_2,O_2^{–}$
• D. Only $B_2,N_2,F_2$

Answer 1

The correct option is B Only $B_2,N_2,F_2{,}^{–}CN{,}^{+}NO$

$B_2,N_2,F_2{,}^{–}CN$ and $N{O}^{+}$ are diamagnetic $B{e}_2^{+},C_2,NO,O_2,O_2^{–}$are paramagnetic.