Which of the following statements are true regarding the lime-soda process of softening the water?
1
The entire carbonate hardness is removed by the lime
2
The non-carbonate hardness of magnesium gets converted to non-carbonate hardness of calcium after reacting with lime
3
Soda ash removes all the non-carbonate hardness of calcium from the water
4
This process removes complete hardness from water and therefore highly effective method for softening.