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JEE MainChemistryClassification of Elements and Periodicity in Properties

Consider the following statements regarding Group 14 elements and their compounds: (A) SnO ₂ and PbO ₂ are amphoteric oxides. (B) PbO ₂ is a strong oxidizing agent because the +4 oxidation state of Pb is less stable than the +2 state. (C) Silicon forms the complex [ SiF ₆]²⁻ whereas carbon cannot form [ CF ₆]²⁻ . (D) The acidic character of dioxides increases down the group. Choose the correct combination of statemen

Options

  1. A(A), (C) and (D) only
  2. B(A), (B) and (C) only
  3. C(B), (C) and (D) only
  4. D(A) and (B) only

Correct answer

B. (A), (B) and (C) only

Step-by-step solution

Statement (A) is correct. The dioxides of carbon and silicon ( CO ₂ , SiO ₂ ) are acidic, GeO ₂ is distinctly acidic but weakly amphoteric, while SnO ₂ and PbO ₂ are amphoteric in nature. Statement (B) is correct. Due to the inert pair effect, the +2 oxidation state is more stable than the +4 state for lead. Thus, PbO ₂ readily gets reduced to Pb ²⁺ , acting as a strong oxidizing agent. Statement (C) is correct. Silicon has vacant d-orbitals in its valence shell, allowing it to expand its coordination number to 6 a

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