A solid mixture of AgCl and K2Cr2O7 is heated with conc. H2SO4 and produces: — Qualitative and Quantitative Analysis Chemistry Question

💡 Solution & Explanation

Step 1: The chromyl chloride test is used to detect chloride ions by heating a chloride salt with K2Cr2O7 and concentrated H2SO4 to form red-orange chromyl chloride (CrO2Cl2) gas. Step 2: However, highly covalent or extremely insoluble chlorides, such as AgCl, Hg2Cl2, HgCl2, and PbCl2, do not release chloride ions readily enough under these conditions to react. Step 3: Consequently, AgCl does not give a positive chromyl chloride test, resulting in no chromyl chloride gas being evolved (no gas). Thus, option (d) is correct.