Identify the incorrect statement:
Show Hint
- In \((\mathrm{Si_3O_9})^{6-}\), tetrahedral \(\mathrm{SiO_4}\) units share two oxygen atoms.
- Trialkylchlorosilane on hydrolysis gives \(\mathrm{R_3SiOH}\).
- \(\mathrm{SiCl_4}\) undergoes hydrolysis to give \(\mathrm{H_4SiO_4}\).
- \((\mathrm{Si_3O_9})^{6-}\) has cyclic structure.
The Correct Option is B
Solution and Explanation
(3): \(\mathrm{SiCl_4 + 4H_2O \rightarrow Si(OH)_4 (= H_4SiO_4) + 4HCl}\). Correct.
(2): \(\mathrm{R_3SiCl + H_2O \rightarrow R_3SiOH + HCl}\) forms a silanol, but the silanol is not the final product: it readily condenses (\(\mathrm{2R_3SiOH \rightarrow R_3Si{-}O{-}SiR_3 + H_2O}\)) to the disiloxane (the dimer). So among the four statements, (2) is the one taken as incorrect.
Answer: (2) Trialkylchlorosilane on hydrolysis gives \(\mathrm{R_3SiOH}\).
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