Methods of removing Hardness of Water:-
Temporary hardness of water can be easily removed by simple ……….the water.
a) freezing
b) melting
c) boiling
d) all of these
By simple boiling of temporary hard water, ………… is formed in water.
a) CO2
b) CaCO3
c) Ca(OH)2
d) MgCO3
The CaCO3 is ……….. in water.
a) insoluble
b) soluble
c) both a & b
d) none of these
