Solid state - II (CBSE )

Following is the schematic alignment of the magnetic moment:

Identify the type of magnetism.

• Diamagnetic

• Paramagnetic

• Ferromagnetic

• Ferrimagnetic

Which of the given solids have both Schottky and Frenkel defects?

• NaBr

• AgCl

• AgBr

• NaCl

Alkali halides do not show Frenkel defect because

• cations and anions have almost equal size

• there is a large difference in size of cations and anions

• cations and anions have low coordination number

• anions cannot be accommodated in voids

p-type semiconductors are formed When Si or Ge are doped with

• group 14 elements

• group 15 elements

• group 13 elements

• group 18 elements

Which of the following crystals does not exhibit Frenkel defect?

• AgBr

• AgCl

• KBr

• ZnS

What type of stoichiometric defect is shown by ZnS?

• Schottky defect

• Frenkel defect

• Both Frenkel and Schottky defects

• Non-stoichiometric defect

Silver halides generally show

• Schottky defect

• Frenkel defect

• Both Frenkel and Schottky defects

• cation excess defect

Which of the following will have metal deficiency defect?

• NaCl

• FeO

• KCl

• ZnO

What is the effect of Frenkel defect on the density of ionic solids?

• The density of the crystal increases

• The density of the crystal decreases

• The density of the crystal remains unchanged

• There is no relationship between density of a crystal and defect present in it

In a Schottky defect

• an ion moves to interstitial position between the lattice points

• electrons are trapped in a lattice site

• some lattice sites are vacant

• some extra cations are present in interstitial space