Punjab Medical Punjab - MET Solved Paper-2008

  • question_answer
    \[SiC{{l}_{4}}\xrightarrow{{{H}_{2}}O}X\xrightarrow{{{1000}^{o}}C}Y\] In the above reaction, \[X\]and \[Y\] respectively, are

    A) \[Si{{O}_{2}}\]and\[Si\]                

    B) \[{{H}_{4}}Si{{O}_{4}}\]and\[Si{{O}_{2}}\]

    C) \[{{H}_{2}}SiC{{l}_{6}}\]and\[Si{{O}_{2}}\]           

    D) \[{{H}_{4}}Si{{O}_{4}}\]and\[Si\]

    Correct Answer: B

    Solution :

    \[\underset{\begin{smallmatrix}  silicon \\  tetrachloride \end{smallmatrix}}{\mathop{SiC{{l}_{4}}}}\,+{{H}_{2}}O\to \underset{\begin{smallmatrix}  silicic\,\,acid \\  \,\,\,\,\,\,\,\,\,\,\,\,(X) \end{smallmatrix}}{\mathop{Si{{(OH)}_{4}}}}\,\xrightarrow[-2{{H}_{2}}O]{{{1000}^{o}}C}\underset{(Y)}{\mathop{Si{{O}_{2}}}}\,\]


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