Q. In the preparation of amorphous silicon, HF acid is used to remove
A) $Mg$
B) $SiO_{2}$
C) $Si$
D) None of these
Explanation
(b)
Amorphous silicon is prepared by the reduction of silica (rocks). Extra pure silicon is obtained by the removal of $SiO_{2}$ by HF.
$SiO_{2} + 4HF \rightarrow SiF_{4} + 2H_{2}O$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.