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The Solid State

Question

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The unit cell of a substance has cation A⁺ at the corners of the unit cell and anions B^- the centre. What is the simplest formula of the the substance?

Solution

Number of cations A⁺ at the corners of the unit cell is

= \frac{1}{8} \times 8 = 1 .

Number of anions B^–at the centre of unit cell is=1
Therefore, simplest formula of the substance = AB.

Some More Questions From The Solid State Chapter

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.

What is the two-dimensional coordination number of a molecule in square close packed layer ?

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