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The Solid State
Question
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Explain the basis of similarities and differences between metallic and ionic crystals.

Answer

The similarities and differences between metallic and ionic crystals are described as below:

Characteristics

Ionic crystals

Metallic crystals

1.

Constituent particles

cations (positive ions) and anions (negative ions)

Positive ions and mobile electrons.

2.

Binding forces

Strong electrostatic forces (electro valent bonding)

Electrical attraction between positive ions and mobile electrons (metallic bonding)

3.

Physical properties

Hard and brittle; high m.p. and b.p. good conductors of heat and electricity in molten state and aqueous solution, high heat of fusion.

Hard but malleable, high m.p., very good conductors of heat and electricity in solid and molten state, moderate heats of fusion.

 

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Some More Questions From The Solid State Chapter

Refractive index of a solid is observed to have the same value along all directions. Comment on the nature of this solid. Would it show clevage property?

Classify the following solids in different categories based on the nature of intermolecular forces operating in them:
Potassium sulphate, tin, benzene, urea, ammonia, water, zinc
sulphate, graphite, rubidium, argon, silicon carbide.

Solid A is a very hard, electrical insulator in solid as well as in molten state and melts at extremely high temperature. What type of solid is it?

Ionic solids conduct electricity in liquid state but not in solid state. Explain.

What type of solids are electrical conductors, malleable and ductile?

Give the significance of a 'lattice point'.

Name the parameters that characterize a unit cell.

Distinguish between Hexagonal and monoclinic unit cells.

Distinguish between Face-centred and end-centred unit cells.