1. Alum Is the answer as permanent hardness can be removed only by sulpha

Permanent hardness of water may be removed by the addition of

1 Alum

2 Sodium carbonate

3 Lime

4 Potassium permanganate

Question Posted / jayant agarwal

Answer Posted / 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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