Magnesium liberates H2 on reaction with : — s Block Elements Chemistry Question

💡 Solution & Explanation

Step 1: Magnesium is a reactive metal positioned above hydrogen in the electrochemical series. Step 2: It reacts with dilute mineral acids like HCl and H2SO4 to liberate hydrogen gas: Mg + 2H+ -> Mg2+ + H2. Step 3: Uniquely, magnesium (along with manganese) also reacts with very dilute nitric acid (HNO3) to evolve hydrogen gas instead of nitrogen oxides. Therefore, magnesium reacts with all of these acids to liberate H2, corresponding to option (d).