Which of the following solids has the highest | vedclass

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(C) $SiO_2$ (silica) has the highest $m.p.$ because it possesses a three-dimensional covalent network structure.In contrast,$CO_2$ and $He_{(s)}$ are

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$SiO_2$

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(C) $SiO_2$ (silica) has the highest $m.p.$ because it possesses a three-dimensional covalent network structure.In contrast,$CO_2$ and $He_{(s)}$ are molecular solids held by weak van der Waals forces,and $H_2O$ (ice) is a molecular solid held by hydrogen bonds,all of which have significantly lower melting points than the giant covalent network of $SiO_2$.

Which of the following solids has the highest $m.p.$?

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