On reaction with dilute H2SO4, which of the following salts will give out a gas that turns an acidif — Qualitative and Quantitative Analysis Chemistry Question

💡 Solution & Explanation

Step 1: Reaction of sodium bromide (NaBr) with concentrated sulfuric acid (H2SO4) initially produces hydrogen bromide (HBr) gas. Step 2: Because conc. H2SO4 is a strong oxidizing agent, it oxidizes the highly reducing HBr to free bromine (Br2) gas, although some unoxidized HBr gas also escapes. Step 3: Consequently, the products obtained on heating include both HBr and Br2, making options (b) and (c) correct.