Solid state

which of the following point defects are shown by AgBr(s) Crystals?

• Schottky and impurity

• Frenkel and schottky

• Frenkel and impurity

• Non stoichiometric defect

The percentage of empty space in a face centre cubic arrangement is

• 74

• 52

• 68

• 26

The electrons are trapped in anionic vacancies in metal excess defect are called

• schottky defect

• Frenkel defect

• f-centre

• Impurity defect

The Crystal having highest melting point is

• Ionic Crystal

• Covalent Crystal

• Molecular crystal

• Metallic Crystal

Basic crystal systems known are

• 6

• 8

• 7

• 9

A liquid which is permanently supercooled is frequently called

(a)  

For tetrahedral coordination, the radius ratio should be

(a)  

The substance which is not antiferromagnetic is

• V2O3

• Fe2O3

The lattice site in a pure crystal cannot be occupied by

(a)  

Copper has the face centered cubic structure. The coordination number of each ion is

• 4

• 12

• 14

• 8