Chemistry - Solid State Question with Solution | TestHub

Iron crystallizes in several modifications. At about $911^{\circ }\mathrm{C}$, the bec ' $\alpha$ ' form undergoes a trasition to fcc ' $\gamma$ ' form. If the distance between the two nearest neighbours is the same in the two forms at the transition temperature, the ratio of the density of iron in fcc form $\left({\rho }_2\right)$ to that of iron of bec form $\left({\rho }_1\right)$ at the transition temperature