MgO is used for lining furnaces because : — s Block Elements Chemistry Question

💡 Solution & Explanation

Step 1: Refractory materials used to line the inside of high-temperature furnaces must be able to withstand extreme temperatures without melting, decomposing, or losing mechanical strength. Step 2: Magnesium oxide (MgO) is a basic oxide with an exceptionally high melting point of approximately 2852°C. Step 3: Due to this extremely high melting point and thermal stability, it is widely utilized as a refractory lining material in steelmaking and other high-temperature furnaces, which corresponds to option (a).