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The p-Block Elements — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryThe p-Block Elements1 Mark
MCQ
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.
  • ✓
    $U.V$. light cannot pass through quartz.
✓

Answer

Correct option: 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 $\ce{SiO_4}$ silicon$–$oxygen tetrahedral, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of $\ce{SiO_2}$. Pure quartz, traditionally called rock crystal or clear quartz, is colorless and transparent or translucent, $U.V$. light can pass through quartz.

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