Match each of the diatomic molecules in Colum | vedclass

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Question

$(A)$ $B_2: \sigma 1 s^2 \sigma 1 s^2 \sigma 2 s^2 \sigma 2 s^2\left|\begin{array}{l}\pi 2 p_y^1 \ \pi 2 p_z^1\end{array}ight|$ paramagnetic. Bond

Vedclass · Accepted Answer

$(A) \rightarrow p, q, r \& ~t,(B) \rightarrow p, r, s,\& ~t, (C) \rightarrow p, q, r, (D) \rightarrow p, q, r \& \ ~s$

Vedclass · Answer

$(A)$ $B_2: \sigma 1 s^2 \sigma 1 s^2 \sigma 2 s^2 \sigma 2 s^2\left|\begin{array}{l}\pi 2 p_y^1 \ \pi 2 p_z^1\end{array}ight|$ paramagnetic. Bond order

$=\frac{6-4}{2}=1$

Bond is formed by mixing of $s$ and p orbitals. $B_2$ undergoes both oxidation \& reduction as

$B_2+O_2 \xrightarrow{	ext { Heat }} B_2 O_3 	ext { (Oxidation) } B_2+H_2 ightarrow B_2 H_6 	ext { (Reduction) }$

$(B)$ $N_2: \sigma 1 s^2 \sigma 1 s^2 \sigma 2 s^2 \sigma 2 s^2 \sigma 2 p_x^2\left|\begin{array}{c}\pi 2 p_y^2 \ \pi 2 p_z^2\end{array}ight|$ diamagnetic. Bond order

$=\frac{10-4}{2}=3 > 2$

$N_2$ undergoes both oxidation and reduction as

$N _2+ O _2 \xrightarrow{\Delta} NO , N _2+3 H _2 \xrightarrow{	ext { Catalyst }} NH _3$

In $N_2$, bonds are formed by mixing of s and p orbitals.

$(C)$ $O_2: \sigma 1 s^2{ }_\sigma^{\star} 1 s^2 \sigma 2 s^2 \sigma 2 s^2 \sigma 2 p_x^2\left|\begin{array}{l}\pi 2 p_y^2 \ \pi 2 p_z^2\end{array}ight|\left|\begin{array}{l}\stackrel{\star}{\pi} 2 p_y^2 \ \stackrel{\star}{\pi} 2 p_z^1\end{array}ight| \stackrel{\star}{\sigma} 2 p_x^0$

Paramagnetic with bond order $=1.5 . O_2^{-}$undergoes both oxidation and reduction

$(D)$ $O_2: \sigma 1 s^2{ }_\sigma^{\star} 1 s^2 \sigma 2 s^2 \sigma 2 s^2 \sigma 2 p_x^2\left|\begin{array}{l}\pi 2 p_y^2 \ \pi 2 p_z^2\end{array}ight|\left|\begin{array}{l}\stackrel{\star}{\pi} 2 p_y^1 \ \stackrel{\star}{\pi} 2 p_z^1\end{array}ight| \stackrel{\star}{\sigma} 2 p_x^0$

Paramagnetic with bond order $=2 . O _2$ undergoes reduction and oxidation

Column $I$	Column $II$
$(A)$ $\mathrm{B}_2$	$(p)$ Paramagnetic
$(B)$ $\mathrm{N}_2$	$(q)$ Undergoes oxidation
$(C)$ $\mathrm{O}_2^{-}$	$(r)$ Undergoes reduction
$(D)$ $\mathrm{O}_2$	$(s)$ Bond order $\geq 2$
	$(t)$ Mixing of ' $\mathrm{s}$ ' and ' $\mathrm{p}$ ' orbitals

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