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.
Which metal is a constituent of both bronze and solder? ...
When cathode rays are deflected onto the electrode of an electrometer, the instrument becomes? ...
What is the chemical symbol for Zinc? ...
Which of the following statements about phosphorus is NOT correct? ...
If humid air is polluted by chlorine discharged, the air can be restored by sprinkling ...
When steam is passed over red-hot carbon, the substances produced are ...