CO_2 is a gas but silica is a solid because:

JEE Main Chemistry question

is a gas but silica is a solid because:

(A) is composed of discrete covalent molecules whereas silica has a continuous tetrahedral structureCorrect
(B) molecules are lighter than molecules
(C) is more acidic than
(D)Melting point of silica is very high

Answer: (A)

Solution

exists as small, discrete, non-polar molecules held together only by weak intermolecular forces (low boiling point, gaseous at room temperature), whereas forms one continuous three-dimensional network of covalently

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Question ID VK-138774