Andhra Pradesh Board Solutions for Chapter: Solid State, Exercise 4: Intext Questions

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

A compound is formed by two elements $\mathrm{M}$ and $\mathrm{N}$. The element $\mathrm{N}$ forms ccp and atoms of $\mathrm{M}$ occupy $1/3$ rd of tetrahedral voids. What is the formula of the compound?

Which of the following lattices has the highest packing efficiency

(i) simple cubic

(ii) body-centred cubic and

(iii) hexagonal close-packed lattice?

An element with molar mass $2.7\times {10}^{-2} \mathrm{k}\mathrm{g} \mathrm{m}\mathrm{o}{\mathrm{l}}^{-1}$ forms a cubic unit cell with edge length $405 \mathrm{p}\mathrm{m}$. If its density is $2.7\times {10}^3 \mathrm{k}\mathrm{g} {\mathrm{m}}^{-3}$, what is the nature of the cubic unit cell?