Question

Given below are two statements:
Statement (I): $\text{SiO}_2$ and $\text{GeO}_2$ are acidic while $\text{SnO}$ and $\text{PbO}$ are amphoteric in nature.
Statement (II): Allotropic forms of carbon are due to property of catenation and $p\pi-d\pi$ bond formation.
In the light of the above statements, choose the most appropriate answer from the options given below:

• A. Both Statement I and Statement II are false
• B. Both Statement I and Statement II are true
• C. Statement I is true but Statement II is false
• D. Statement I is false but Statement II is true

Answer 1

Answer: (C)

Statement I is true but Statement II is false

Answer 2

Statement (I):} This statement is correct. SiO$_2$ (silicon dioxide) and GeO$_2$ (germanium dioxide) exhibit acidic behavior as they are covalent oxides. On the other hand, SnO (tin(II) oxide) and PbO (lead(II) oxide) are amphoteric in nature, meaning they can react with both acids and bases.
Statement (II): This statement is false. While catenation is indeed a key property responsible for the existence of multiple allotropic forms of carbon, $\pi$-$\pi$ bond formation is not the primary reason for carbon allotropy. Instead, the different hybridization states (sp$^3$, sp$^2$, and sp) and bonding patterns play a more critical role.
Conclusion: Statement I is true as it accurately describes the nature of the oxides, while Statement II is false because it incorrectly attributes carbon allotropy primarily to $\pi$-$\pi$ bond formation.