Phosphine is obtained by the reaction when: — p Block Elements Chemistry Question

💡 Solution & Explanation

Step 1: Ammonium dichromate, (NH4)2Cr2O7, undergoes thermal decomposition upon heating, which is a well-known chemical volcano reaction. Step 2: The balanced chemical equation for this reaction is: (NH4)2Cr2O7 --Δ--> N2(g) + Cr2O3(s) + 4H2O(g). Step 3: This reaction yields nitrogen gas, a green chromium(III) oxide residue, and water vapor. Thus, the products are N2, Cr2O3, and H2O, matching option (b).