Contrast the structure and properties of CO₂ and SiO_2.

Solution

Carbon dioxide(CO₂)	Silica (SiO₂)
1. It is a monomeric linear gaseous molecule as O =C = O	1. It is a solid network having a three-dimensional structure in which each silicon atom is tetrahedrally surrounded by four oxygen atoms.
2. It is soluble in water.	2. It is insoluble in water.
3. On reduction with coke (carbon), it forms carbon monoxide $straight C plus CO subscript 2 space rightwards arrow space 2 CO$	3. On reduction with carbon in an electric furnace, it produces silicon carbide. $SiO subscript 2 space plus space 3 straight C space rightwards arrow space space SiC space plus space 2 CO$

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