Permanent hardness of water may be removed by the addition of 1 Alum 2 Sod

Permanent hardness of water may be removed by the addition of

1 Alum

2 Sodium carbonate

3 Lime

4 Potassium permanganate

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Permanent hardness of water may be removed by the addition of 1 Alum 2 Sodium carbonate 3 L..

Answer / guest

(2) Sodium carbonate

Is This Answer Correct ?

49 Yes

13 No

Permanent hardness of water may be removed by the addition of 1 Alum 2 Sodium carbonate 3 L..

Answer / souvik

lime

Is This Answer Correct ?

16 Yes

6 No

Permanent hardness of water may be removed by the addition of 1 Alum 2 Sodium carbonate 3 L..

Answer / jayant agarwal

1. Alum
Is the answer as permanent hardness can be removed only by sulphate or chloride compounds.

Is This Answer Correct ?

11 Yes

3 No

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