JEE Main & Advanced Chemistry Hydrogen & Its Compounds Question Bank Water or hydride of oxygen

  • question_answer Which of the following acid is formed when \[Si{{F}_{4}}\] reacts with water [BHU 2004]

    A) \[Si{{F}_{4}}\]

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

    C) \[{{H}_{2}}S{{O}_{4}}\]

    D) \[{{H}_{2}}Si{{F}_{6}}\]

    Correct Answer: B

    Solution :

    Silicon tetra fluoride on hydrolysis furnish ortho silicic acid and hydrogen silicofluoride. \[\underset{\begin{smallmatrix}  (\text{Silicon tetra} \\  \text{Fluoride}) \end{smallmatrix}}{\mathop{3Si{{F}_{4}}}}\,+\underset{\text{(Water)}}{\mathop{4{{H}_{2}}O}}\,\xrightarrow{{}}\underset{\begin{smallmatrix}  (\text{Ortho} \\  \text{Silicic acid}) \end{smallmatrix}}{\mathop{{{H}_{2}}Si{{O}_{4}}}}\,+\underset{\begin{smallmatrix}  (\text{Hydrogen Silico} \\  \text{Fluoride}) \end{smallmatrix}}{\mathop{2{{H}_{2}}Si{{F}_{4}}}}\,\]

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