Figure 3.

(a) Confirmatory test for sulfuric acid in patient 2. In the presence of barium chloride, sulfuric acid gives milky white precipitate. The test also has same white precipitate, which indicates the presence of sulfuric acid in the test sample. (b) Confirmatory test for hydrochloric acid in patient 3. In presence of silver nitrate (AgNO₃), hydrochloric acid gives white precipitate. Curd-like white precipitate of 7 test samples on the left similar to the standard on the right indicates the presence of hydrochloric acid. The tests for the other acids were negative for either of the test samples