3020. Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is __________ percent. September 7, 2025 by Admin < 37% >71% In between 37 & 71% None of these ✅ The correct answer is option C.
