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The Solid State

Question

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A compound forms hexagonal closed-packed structure. What is the total number of voids in 0.5 mol of it? How many of these are tetrahedral voids?

Solution

Number of closed packed particeles =

0.5 \times 6.022 \times 10^{23} = 3.011 \times 10^{23}

therefore number of octhahedral voids = 3.011

\times 10^{23}

and number oftetrahedral voids =

2 \times 3.011 \times 10^{23} = 6.022 \times 10^{23}

therefore total number of voids=

3.011 \times 10^{23} + 6.022 \times 10^{23} = 9.033 \times 10^{23}

.

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.

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