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Solid State
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Q. The number of octahedral sites per sphere in fcc structure is?
No. of octahedral voids = No. of ions in the packing
=> Octahedral voids per sphere = 1
Q. An example of a substance possessing giant covalent structure is?
Silica (SiO2) has giant covalent structure.
Q. What is the meaning of anisotropy?
The property of a material which allows it to change or assume different properties in different directions as opposed to isotropy.
Q. A pure crystalline substance, on being heated gradually, first forms a turbid looking liquid and then the turbidity completely disappears. This behavior is the characteristic of substances forming.?
It is a characteristic of liquid crystal.
liquid crystals form turbid looking liquid on heating and on further heating these crystals breakdown and pure liquid is formed hence the turbidity disappears.