Match the columns (assume the unit cell edge length equal to ) — Solid State Chemistry Question

💡 Solution & Explanation

(P) In simple cubic, nearest distance is $a$ (A). (Q) In BCC, nearest distance is $\frac{\sqrt{3}}{2}a$ (C). (R) In FCC, nearest distance is $\frac{a}{\sqrt{2}}$ (B). (S) In simple cubic, next nearest is $\sqrt{2}a$ (D). (T) In BCC, next nearest is $a$ (A). Therefore, correct pairs are A $\rightarrow$ P, T; B $\rightarrow$ R; C $\rightarrow$ Q; D $\rightarrow$ S.