Question

Which among the following is/are the reasons why hard water is not used in industrial boilers?

• A. It causes corrosion of the boiler.
• B. The heating efficiency decreases.
• C. They produce rich lather with soap.
• D. It contains small amount of salts.

Answer 1

Answer: (A), (B)

The heating efficiency decreases.

Hard water is made up of calcium and magnesium salts. It is not used in industrial boilers, as it forms insoluble salts of calcium and magnesium. As a result, they produce scales on the inner walls of the boilers which reduces the heating efficiency. They also cause corrosion in the boilers.