Match the crystal system/unit cells mentioned in Column I with their characteristic features mention — Solid State Chemistry Question

💡 Solution & Explanation

Simple cubic and FCC are unit cells of the same cubic crystal system (S) with $a=b=c, \alpha=\beta=\gamma=90^\circ$ (P). Cubic and rhombohedral are two distinct crystal systems (Q) that both have $a=b=c, \alpha=\beta=\gamma$ (P). Cubic and tetragonal are two different crystal systems (Q). Hexagonal ($\alpha=\beta=90^\circ, \gamma=120^\circ$) and monoclinic ($\alpha=\gamma=90^\circ, \beta \neq 90^\circ$) are two crystal systems (Q) that each have exactly two crystallographic angles of $90^\circ$ (R). Therefore, correct pairs are A $\rightarrow$ P, S; B $\rightarrow$ P, Q; C $\rightarrow$ Q; D $\rightarrow$ Q, R.