Chemistry - Complete Pblock- Question with Solution | TestHub

Identification of P, Q, and R: P is SiO₂ (silica from glass apparatus), which reacts with XeF₆ to form Q (XeOF₄) and SiF₄. Then, XeOF₄ reacts with XeO₃ to produce R (XeO₂F₂).

Evaluating Statement (A): SiO₂ is an acidic flux used to remove basic impurities (like FeO) during metallurgy, making statement (A) incorrect.

Evaluating Statements (B, C, D): Both XeOF₄ and XeO₂F₂ are formed during the partial hydrolysis of XeF₆, and XeOF₄ is a colorless volatile liquid containing one lone pair and a $p\pi -d\pi$ bond, making these statements correct.

Therefore, the incorrect statement is (A).