Question

Permanent hardness of water may be removed by the addition of

(A) sodium carbonate

(B) alum

(C) potassium permanganate

(D) lime​

Answer 1

❤♠️HËŁŁÓ MÃŤÉ♠️❤

Permanent hardness of water may be removed by the addition of

(A) sodium carbonate.

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Answer 2

Hey mate,

Permanent hardness of the water may be removed by the addition of SODIUM CARBONATE (Na2CO3).

OPTION A IS CORRECT.

Hope it helps!