1.

Carbon dioxide is a gas silica is a solid because:

Answer»

CARBON DIOXIDE is composed of discrete COVALENT`CO_2` molecules, whereas SILICA has CONTINUOUS tetrahedral structure.
`CO_2` molecules are lighter than `SiO_2` molecules
`CO_2` is more acidic than `SiO_2`
Melting point of silica is very high

Answer :A


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