Question

Statement 1: It is not safe to use hard water in industrial boilers.
Statement 2: Calcium carbonate is a good conductor of heat.

• A. Statement 1 is correct but statement 2 is incorrect
• B. Statement 2 is correct but statement 1 is incorrect
• C. Both statement 1 and statement 2 are correct
• D. Both statement 1 and statement 2 are incorrect

Answer 1

The correct option is A Statement 1 is correct but statement 2 is incorrect

Hard water might contain dissolved calcium bicarbonate. Calcium carbonate is deposited at the bottom of boilers and pipes as a result of boiling hard water. These ${\text{CaCO}}_3$ deposits are bad conductors of heat. As more hard water is boiled, more deposits are formed. Thus, it requires more time to boil the water and could lead to a dangerous boiler blasts. So, it is not safe to use hard water in industrial boilers.