Chemistry · Covalent Bonding: Concept of electronegativity, Fajan's rule, dipole moment, Valence Shell Electron Pair Repulsion (VSEPR) theory and shapes of simple molecules
Which of the following pairs of elements form oxides of polyanions and polycatio
Which of the following pairs of elements form oxides of polyanions and polycations respectively:
- A. \( S i \) and \( A l \)
- B. \( C u \) and \( S i \)
- C. \( A l \) and \( B \)
- D. \( T i \) and \( A s \)
Step-by-step solution
Titanium (Ti) forms oxides that yield polycations in aqueous solution, such as the titanyl ion (TiO²⁺). Arsenic (As) forms oxides like As₂O₅ that yield polyanions, such as arsenate (AsO₄³⁻). Therefore, this pair consists of one element forming polyanion oxides (As) and the other forming polycation oxides (Ti), matching the description.