Question

Which of the following crystal has unit cell such that $a\ne b\ne c$ and $\alpha \ne \beta \ne \gamma \ne {90}^o?$

• A. $KN{O}_3$
• B. $K_{2}S{O}_4$
• C. $K_{2}C{r}_2{O}_7$
• D. $NaN{O}_3$

Answer 1

Answer: (C)

$K_{2}C{r}_2{O}_7$

$K_{2}C{r}_2{O}_7$ has $\text{triclic}$ unit cell such that
$a\ne b\ne c$ and $\alpha \ne \beta \ne \gamma \ne {90}^o$.

Hence, the correct option is $\text{C}$