Consider the following statements regarding the preparation of some p-block elements and their compounds: (A) Pure nitrogen is obtained by the thermal decomposition of barium azide. (B) In the Haber process, iron oxide with small amounts of K ₂ O and Al ₂ O ₃ is used as a catalyst. (C) The Contact process involves the oxidation of SO ₂ to SO ₃ using CuCl ₂ as a catalyst. (D) Deacon's process is used for the commercia

Step-by-step solution

Statement (A) is correct as very pure nitrogen is obtained by the thermal decomposition of sodium or barium azide. Statement (B) is correct; iron oxide with small amounts of K ₂ O and Al ₂ O ₃ is the catalyst currently used in the Haber process for the manufacture of ammonia. Statement (C) is incorrect because the oxidation of SO ₂ to SO ₃ in the Contact process uses V ₂ O ₅ as a catalyst. CuCl ₂ is used as a catalyst in Deacon's process. Statement (D) is correct; Deacon's process is a commercial method for prepari