Which of the following methods can be used to remove temp...
Which of the following methods can be used to remove temporary hardness from water?
Boiling
Filtration
sedimentation
Chlorination
Correct answer is A
Temporary hardness in water can be removed by boiling. When water is boiled, the calcium and magnesium bicarbonates decompose, forming insoluble calcium carbonate (CaCO3) and magnesium carbonate (MgCO3), which precipitate out of the water.
Metals which react with steam only when they are red-hot include...
The percentage by mass of calcium in Ca(OCI)2 is [Ca = 40.0; CI = 35.5; O = 16.0] ...
The acid used in electrolysis of water is dilute? ...
The main active constituent of tea and coffee is ...
The lanthanides and actinides are located in which block of the periodic table? ...