Chemistry - Solid State Class 12 JEE
Packing fraction of SCC
.08
Packing fraction of BCC
.68
Packing fraction of FCC
.74
Coordination Number of FCC
12
How many types of bravais crystal lattices are there
14
Coordination Number of SCC
6
How many crystal systems can bravais lattice's be grouped in
7
Coordination Number of BCC
8
What type of solid is quartz glass, Rubber
Amorphous
What type of solid is quarts, and SiO2
Crystalline solid
most symmetrical system
Cubic system
Polar crystalline sold
Dipole-Dipole force of attraction HCl, SO2
Ionic crystalline solid
Electrostatic force of attraction NaCl, CsCl
Annealing
Heating of amosphous solid can turn it into a crystalline solid. When cooled it returns back to amorphous state
What type of close packing has maximum packing efficiency
Hexagonal close Packing, Cubic closed packing
H bonded crystalline solid
Hydrogen bonding forces of attraction H2O
Non polar Crystalline solid
London force of attraction Ar, CO2
End centered lattice
Particles in center of front and opposite face pair +corners
Hexagonal system lattices
Primitive
Rhombohederal system lattices
Primitive
Triclinic system lattices
Primitive
Cubic system lattices
Primitive, Body centered, Face centered
orthorhombic system lattices
Primitive, Body centered, face centered, End centered
Monoclinic system lattices
Primitive, end centered
SCC Relation b/w edge and radius
R = A/2
BCC relation between edge and radius
R = a root 3/4
Amorphous Solid
Random Molecular arrangement Short ranges of order isotropic
Crystaline Solid
Structured molecular arrangement long-range of order Sharp melting point anisotropic
Most unsymmetric system
Triclinic system
Density of a crystal
ZM/Na(A)^3
FCC Relation b/w edge and radius
a root 2 / 4
Number of neighbors if an element is along a) edge b) face c) body diagonal d) any other
a) 6 b) 12 c) 8 d) 24
Cubic system sides & angles
a=b=c α=β=γ=90
Rhombohedral system sides & angles
a=b=c α=β=γ≠90
Tetragonal System sides & angles
a=b≠c α=β=γ=90
Hexagonal system sides & angles
a=b≠c α=β=90 γ=120
Orthorombic System sides & angles
a≠b≠c α=β=γ=90
Monoclinic system sides & angles
a≠b≠c α=γ=90° β≠90°
Triclinic system sides & angles
a≠b≠c α≠β≠γ
Tetragonal system lattices
primitive, body centered
