Solid Sate

The number of nearest particles which is in direct contact with a particle in a closed packed structure

• Unit Cell

• Void

• Packing efficiency

• Coordination number

In a primitive unit cell atoms are present at the

• Corners & Centers of any 2 opposite sides

• Corners only

• Corners and Body Centre

• Corners & Centers of all faces

Number of atoms per unit cell in a Face Centered Cubic lattice

• 4

• 1

• 2

• 6

Crystalline solids are

• Isotropic

• Allotropic

• Anisotropic

• Isomorphic

Crystal showing both Schottky & Frenkel defect

• AgBr

• ZnO

• AgI

• NaCl

Defect shown by ionic crystals with large difference in size

• Schottky Defect

• Impurity Defect

• Frenkel Defect

• Metal Deficiency Defect

Anionic sites occupied by unpaired electrons are called

• F Centres

• Interstitial Centres

• Cationic Centres

• Anionic Centres

An example for Network solid

• Corundum

• Diamond

• Dry Ice

• KCl

AB AB … type close packing pattern represents

• HCP

• FCC

• CCP

• BCC

The total number of tetrahedral voids and octahedral voids in a given cubic unit cell with N number of atoms will be respectively

• 2N and N

• N and 2N

• 4N and N

• N and 4N