Question

The structure of silicon (IV) oxide belongs to the type:
A.Ionic lattice
B.Macromolecular, with a layer structure
C.Molecular lattice, with van der waals forces among the molecules
D.Macromolecular, with a non-layer structure.

Answer 1

Hint: Silicon (IV) oxide makes a very large structure with a similar structure as that of diamond. The atoms occur in 3 dimensional networks forming covalent bonds.

Complete step by step answer:
-Silicon dioxide is also known as silica. It is found in living organisms and is found in nature as quartz.Silica shows tetrahedral structures with silicon as a central atom and four oxygen atoms in tetrahedral manner surround the silicon atom. In the same way it forms three dimensional network solid, covalently bonded with each other in tetrahedral geometry. The structure is very similar to the one we use to see in diamond. Oxidation state of silicon in silicon dioxide is four.
-The structure formed by silicon oxide is a macromolecule because of the formation of networks and is a non layer structure that the atoms are not present in on layer or plane.
  Silica also occurs in plant it and is a primary component of rice husk Ash. Silica is also used in food as an additive. It is also used as an anti-caking agent to avoid formation of lumps in the foods specially spices and powder products. Silicon is a very important element in semiconductor chemistry.

Hence the correct option is D.

Note:
Silicon has the atomic number 14 and it belongs to the group 6 of the carbon family. Oxygen has the atomic number 8 and belongs to group number 8. It is the second most electronegative element in the modern periodic table.