Question

Which of the following species has a Lewis structure with a molecular geometry similar to SO2?

Select one:

H2S
NO2 negative one
Cl2CO
N2O
NO2

Answer 1

Answer on Question #44848 – Chemistry – Other

Question

Which of the following species has a Lewis structure with a molecular geometry similar to $\mathrm{SO}_2$?

Select one:

$\mathrm{H}_2\mathrm{S}$

$\mathrm{NO}_2$ negative one

$\mathrm{Cl}_2\mathrm{CO}$

$\mathrm{N}_2\mathrm{O}$

$\mathrm{NO}_2$

Answer

$\mathrm{SO}_2$ has a Lewis structure with bent molecular geometry:

$\mathrm{N}_2\mathrm{O}$ and $\mathrm{Cl}_2\mathrm{CO}$ have Lewis structures with whole different molecular geometry, namely $\mathrm{N}_2\mathrm{O}$ has linear molecular geometry:

$$\stackrel{\leftrightarrow}{\mathrm{N}} = \mathrm{N} = \stackrel{\leftrightarrow}{\mathrm{O}}$$

and $\mathrm{Cl}_2\mathrm{CO}$ has trigonal planar molecular geometry:

The rest tree species have Lewis structure with bent molecular geometry similar to $\mathrm{SO}_2$, but $\mathrm{H}_2\mathrm{S}$ has two lone pairs of electrons on the sulfur atom (tetrahedral electron pair geometry), and the repulsion forces of these lone pairs result in the angle $\mathsf{H} - \mathsf{S} - \mathsf{H}$ to be considerably less ($92^{\circ}$) than the angle $\mathsf{O} = \mathsf{S} = \mathsf{O}$ in $\mathrm{SO}_2$ ($119^{\circ}$).

$\mathrm{NO}_2$ has one lone pair on the central atom and bent molecular geometry similar to that of $\mathrm{SO}_2$ but the angle $\mathrm{O}-\mathrm{N}-\mathrm{O}$ in $\mathrm{NO}_2$ is greater ($134^{\circ}$) than the angle of $\mathrm{SO}_2$:

$\mathrm{NO}_2^-$ has the angle very close to that in $\mathrm{SO}_2$ ($115^{\circ}$):

So, $\mathrm{NO}_2$ negative one has a Lewis structure with a molecular geometry most similar to $\mathrm{SO}_2$.

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