JEE Main 2025 Chemistry question
Mass of magnesium required to produce 220 mL of hydrogen gas at STP on reaction with excess of dil. HCl is Given: Molar mass of Mg is 24 g mol.
Answer: (4)
Solution
Moles of H2 = 220/22400; Mass of Mg = (220/22400)×24 = 0.236g = 236mg