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