Question

Which of the following is wrong about silica?

• A. Purest form of silica is know as quartz.
• B. Quartz is also know as rock crystal.
• C. Quartz contain hexagonal prisms.
• D. U.V. light cannot pass through quartz.

Answer 1

The correct option is D U.V. light cannot pass through quartz.

Quartz is the second most abundant mineral in the Earth's continental crust, after feldspar. Its crystal structure is a continuous framework of SiO4 silicon–oxygen tetrahedral, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2. Pure quartz, traditionally called rock crystal or clear quartz, is colorless and transparent or translucent, U.V. light can pass through quartz.