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Carbon dioxide is a gas but silica is a ...

Carbon dioxide is a gas but silica is a solid because:

A

`CO_(2)` is a linear molecule, while `SiO_(2)` is angular

B

van der Waals's forces are very strong in `SiO_(2)`

C

`CO_(2)` is covalent, while `SiO_(2)` is ionic

D

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

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The correct Answer is:
D
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