Consider the following statements and which of the following are correct? SiO _ 4 ^ 4- on…
Chemistry · NEET · NTA Exams — p-Block Elements
Consider the following statements and which of the following are correct?
- \(\mathrm{SiO}_{4}^{4-}\) on hydrolysis with acid or H2O gives \(\mathrm{Si}_{2} \mathrm{O}_{7}^{5-}\) unit.
- \(\mathrm{B}_{4} \mathrm{O}_{7}^{2-}\) on hydrolysis with acid or H2O gives B(OH)3.
- Among CO2, CuO, CaO and H2O, CO2 is most acidic but CaO is most basic oxide.
- Graphite acts as a metallic conductor along the layers of carbon atoms and as semiconductor, perpendicular to the layers of carbon atoms.
- I, II, and III
- II and III
- I, II, III, and IV
- I and II
Answer
(A) I, II, and III
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