Q.

Which of the following has a giant covalent structure?

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a

Lead oxide

b

Aluminium chloride

c

Silica

d

Sodium chloride

answer is B.

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Detailed Solution

Giant covalent structures (lattices) of atoms include silicon dioxide (silica), diamond, graphite (a kind of carbon), and graphite. 

Strong covalent connections connect every atom in these structures to every other atom, giving these structures extremely high melting temperatures.

SiO2is a network solid

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