Question

Which oxides has three dimensional structure?

• A. $C{O}_2$
• B. $S{O}_2$
• C. CO
• D. $Si{O}_2$

Answer 1

The correct option is D $Si{O}_2$

$CO,C{O}_2$ are linear shaped molecules where as $S{O}_2$ is a bent shaped molecule, $Si{O}_2$ is a covalent, 3-D network solid. Each Si atom is covalently bonded in a tetrahedral manner to four oxygen atoms.
Si in $Si{O}_2$ is $s{p}^3$ hybridised with no lone pairs.
Structure of $Si{O}_2$