A) \[Mg\]
B) \[Si{{O}_{2}}\]
C) \[Si\]
D) None of these
Correct Answer: B
Solution :
Amorphous silicon is prepared by reduction of silica (rocks). Extra pure silicon is obtained by removal of \[Si{{O}_{2}}\] by HF. \[Si{{O}_{2}}+4HF\xrightarrow{{}}Si{{F}_{4}}+2{{H}_{2}}O\]
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