CO_(2) is a gaswhile SaO_(2)is a solid. Explain.

1.	CO_(2) is a gaswhile SaO_(2)is a solid. Explain.
Answer» Solution :Carbon becauseof its small size and higher electronegativity than siliconforms `ppi-ppi`double bondswith O-ATOMS to form `CO_(2)`molecule. These molecules of `CO_(2)` are heldtogether byweak van der WAALS forces of attractswhich can be easilyovercome by collision of the molecules at room temperature. Consequently, `CO_(2)` isa gas. Silicon,on the otherhand,because of its bigger size andlowereletronegativitythan carbonhas little tendency to form `ppi-ppi`double BONDS with `O`-atoms . Instead, each silicon atom forms four single, covalentbonds withO-atomswhich aretetrahedrally arrangedaroundit leading to the FORMATIONOF a three-dimensionalnetworkstructure . To breakthese covalentbonds, a large amount of energyis needed and hence `SiO_(2)` is a high meltingsolid.

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