The number of octahedral sites per sphere in fcc structure is
4
8
1
2
In a crystal the cations A+ are arranged at the corner and the anions B- are occupied in all the octahedral voids and half of the tetrahedral voids. The formula of the compound is
AB2
AB
A3B
The existence of a substance in more than one solid modification is known as
Isomorphism
Amorphism
Polymorphism
Isotropy
Body diagonal of a cube is 866pm. Its edge length would be
500pm
586pm
408pm
612.4pm
The phenomenon in which crystals produce electricity on applying pressure is
Pyro electricity
Ferro electricity
Piezo electricity
Ferri electricity
If a≠b≠c, B≠90o the crystal system is
Monoclinic
Cubic
Hexagonal
Orthorhombic
The type of cubic lattice having maximum number of atoms per unit cell is
Simple cubic
Face centered cubic
Body centered cubic
All have same
CsBr crystal has BCC structure. Its edge length is 4.3 Ao. The shortest inter ionic distance between Cs+ and Br- ions is
1.86Ao
3.72Ao
4.3Ao
7.44Ao
The substance which conduct electricity in the solid state is
Iodine
Graphite
Diamond
Sodium chloride
The crystal which shows both Frenkel as well as Schottky defect is
AgBr
AgCl
NaCl
NaBr