Question

Choose the correct option:

$\begin{array}{cccc}& \text{Crystal system}& \text{Axial distance}& \text{Axial angles}\\ \text{(a)}& \text{Tetragonal}& a=b\ne c& \alpha =\beta =\gamma ={90}^{\circ }\\ \text{(b)}& \text{Monoclinic}& a\ne b\ne c& \alpha =\gamma ={90}^{\circ }\beta \ne {90}^{\circ }\\ \text{(c)}& \text{Rhombohedral}& a\ne b=c& \alpha =\beta =\gamma \ne {90}^{\circ }\\ \text{(d)}& \text{Triclinic}& a\ne b\ne c& \alpha \ne \beta \ne \gamma \ne {90}^{\circ }\end{array}$

• A. a
• B. b
• C. c
• D. d

Answer 1

The correct option is C c

Choose the correct option:

$\begin{array}{cccc}& \text{Crystal system}& \text{Axial distance}& \text{Axial angles}\\ \text{(a)}& \text{Tetragonal}& a=b\ne c& \alpha =\beta =\gamma ={90}^{\circ }\\ \text{(b)}& \text{Monoclinic}& a\ne b\ne c& \alpha =\gamma ={90}^{\circ }\beta \ne {90}^{\circ }\\ \text{(c)}& \text{Rhombohedral}& \text{a = b = c}& \alpha =\beta =\gamma \ne {90}^{\circ }\\ \text{(d)}& \text{Triclinic}& a\ne b\ne c& \alpha \ne \beta \ne \gamma \ne {90}^{\circ }\end{array}$