BVP Medical BVP Medical Solved Paper-2011

  • question_answer In the preparation of amorphous silicon, HF is used to remove

    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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