The answer is (3) Ag.
Silver (Ag) reacts with concentrated sulfuric acid \((H_2SO_4)\) to form silver sulfate \((Ag_2SO_4)\) and sulfur dioxide \((SO_2)\) gas. The reaction can be represented by the following equation:
\(2Ag + 2H_2SO_4 → Ag_2SO_4 + SO_2 + 2H_2O\)
Concentrated sulfuric acid is a strong oxidizing agent, and it can oxidize silver to silver sulfate while being reduced to sulfur dioxide.
Pt (platinum) and Au (gold) do not react with concentrated sulfuric acid under normal conditions. These metals are generally resistant to corrosion and do not undergo significant reactions with most acids, including sulfuric acid.
Therefore, the correct answer is (3) Ag, as it reacts with concentrated sulfuric acid to form silver sulfate and sulfur dioxide. |
