Question

$C{O}_2$ is gas, while $Si{O}_2$ is solid because :

• A. $C{O}_2$ is a linear molecule, while $Si{O}_2$ is angular.
• B. van der Waals' forces are very strong in $Si{O}_2$.
• C. $C{O}_2$ is covalent, while $Si{O}_2$ is ionic.
• D. $Si$ cannot form stable bonds with $O$, hence $Si$ has to form a $3D$ lattice.

Answer 1

Answer: (D)

$Si$ cannot form stable bonds with $O$, hence $Si$ has to form a $3D$ lattice.

$Si{O}_2$ is solid because $Si$ cannot form stable bonds with $O$, hence $Si$ has to form a $3D$ lattice of $Si{O}_2$ molecules and form solid structure.