Match the crystal system/unit cells mentioned | vedclass

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Question

(A) Analysis of the options:$(A)$ Simple cubic and face-centred cubic belong to the same crystal system (Cubic),so $(A-s)$. They also have parameters

Vedclass · Accepted Answer

$A-p, s; B-p, q; C-q; D-q, r$

Vedclass · Answer

(A) Analysis of the options:$(A)$ Simple cubic and face-centred cubic belong to the same crystal system (Cubic),so $(A-s)$. They also have parameters $a=b=c$ and $\alpha=\beta=\gamma=90^{\circ}$,so $(A-p)$.$(B)$ Cubic and rhombohedral are two distinct crystal systems,so $(B-q)$. Cubic has $a=b=c$ and $\alpha=\beta=\gamma=90^{\circ}$,so $(B-p)$.$(C)$ Cubic and tetragonal are two distinct crystal systems,so $(C-q)$.$(D)$ Hexagonal and monoclinic are two distinct crystal systems,so $(D-q)$. Hexagonal has $\alpha=\beta=90^{\circ}, \gamma=120^{\circ}$ and Monoclinic has $\alpha=\gamma=90^{\circ}, \beta 
eq 90^{\circ}$. Both have exactly two angles equal to $90^{\circ}$,so $(D-r)$.Thus,the correct matching is $A-p, s; B-p, q; C-q; D-q, r$.

Column $I$	Column $II$
$(A)$ Simple cubic and face-centred cubic	$(p)$ have these cell parameters $a=b=c$ and $\alpha=\beta=\gamma=90^{\circ}$
$(B)$ Cubic and rhombohedral	$(q)$ are two crystal systems
$(C)$ Cubic and tetragonal	$(r)$ have only two crystallography angles of $90^{\circ}$
$(D)$ Hexagonal and monoclinic	$(s)$ belong to same crystal system

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