Which of the following is not a unit of hardness?

Related MCQs

• Alkaline hardness is due to the presence of bicarbonate, carbonate and hydroxides of the hardness-producing metal ions.
• In which process of water softening, the chemicals are added to remove hardness from water?
• Hardness of water is due to the presence of salts of                          
• Hardness of water is conventionally expressed in terms of equivalent amount of
• How many grams of MgCO3 dissolved per litre gives 84 ppm hardness?
• EDTA method for hardness determination is a less accurate and inconvenient procedure.
• Estimation of hardness can be determined by                  types.
• Total hardness of water can be determined by titrating the fixed volume of water against the standard                        solution.
• The sodium soap will precipitate all the hardness causing ions into their respective
• The hardness in the ion exchange process is reduced to