General Knowledge - General Science - Discussion

Discussion Forum : General Science - Elements and Metals (Q.No. 32)

General Science

32.

Permanent hardness of water may be removed by the addition of

sodium carbonate

alum

potassium permanganate

lime

Answer: Option

Explanation:

No answer description is available. Let's discuss.

Discussion:

12 comments Page 2 of 2.

Mehdi said: 8 years ago

Would salt in water is temporary or not?

Subrajit said: 9 years ago

What is the chemical reaction?

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