When a solution of Na2ZnO2 is acidified with dilute HCl and treated with H2S, a precipitate of ZnS i — Qualitative and Quantitative Analysis Chemistry Question

💡 Solution & Explanation

Step 1: Identify the colors of each compound in the options. Step 2: Lead chromate (PbCrO4), arsenic(III) sulfide (As2S3), and tin(IV) sulfide (SnS2) are well-known compounds that form yellow precipitates. Step 3: In contrast, Sb2S3 is orange-red and PbO is usually yellow-to-reddish, but the set in option (c) strictly consists entirely of yellow precipitates: PbCrO4 (yellow), As2S3 (yellow), and SnS2 (yellow). This matches option (c).