A) \[\text{Si}{{\text{O}}_{2}}\]and Si
B) \[{{\text{H}}_{\text{4}}}\text{Si}{{\text{O}}_{\text{4}}}\] and \[\text{Si}{{\text{O}}_{\text{2}}}\]
C) \[\text{Si}{{\text{O}}_{\text{2}}}\] and \[\text{SiC}\]
D) \[{{\text{H}}_{\text{4}}}\text{Si}{{\text{O}}_{\text{4}}}\] and \[\text{SiC}\]
Correct Answer: B
Solution :
\[\text{SiC}{{\text{l}}_{\text{4}}}\] on hydrolysis gives orthosilicic acid \[({{H}_{4}}Si{{O}_{4}})\] and \[\text{HCl}\text{.}\]Orthosilicic acid on strong heating at \[1000{{\,}^{o}}C\]loses tow water molecules and gives \[\text{Si}{{\text{O}}_{\text{2}}}\](silica). \[SiC{{l}_{4}}+4{{H}_{2}}O\xrightarrow{{}}\underset{(X)}{\mathop{{{H}_{4}}Si{{O}_{4}}}}\,+4HCl\] \[{{H}_{4}}Si{{O}_{4}}\xrightarrow[\Delta ]{1000\,{{\,}^{o}}C}\underset{(Y)}{\mathop{Si{{O}_{2}}}}\,+2{{H}_{2}}O\]
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