Embibe Experts Solutions for Chapter: Solid State, Exercise 3: EXERCISE-3

Match the column

A solid ${\mathrm{A}}^{+}{\mathrm{B}}^{-}$ has $\mathrm{NaCl}$ type close packed structure. If the anion has a radius of $250 \mathrm{pm}$, what should be the ideal radius of the cation ? Can a cation ${\mathrm{C}}^{+}$ having a radius of $180 \mathrm{pm}$ be slipped into the tetrahedral site of the crystal ${\mathrm{A}}^{+}{\mathrm{B}}^{-}$ ? Give reason for your answer.

In a cubic crystal of $\mathrm{CsCl}$  $\left(density=\frac{3.97 \mathrm{gm}}{{\mathrm{cm}}^3}\right)$the eight corner are occupied by ${\mathrm{Cl}}^{-}$ ions with ${\mathrm{Cs}}^{+}$ ions at the centre. Calculate the distance between the eight surrounding ${\mathrm{Cs}}^{+}$ and ${\mathrm{Cl}}^{-}$ ions. Atomic mass of $\mathrm{Cs}=132.9$ atomic mass of $\mathrm{Cl}=35.5$

The composition of a sample of wustite is ${\mathrm{Fe}}_{0.93}{\mathrm{O}}_{1.00}$. What mass percentage of iron is present in the form of $\mathrm{Fe}\left(\mathrm{III}\right)$ions?