The permanent hardness of water is due to presence ______...?

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The permanent hardness of water is due to presence ______...?

(A) MgSO4

(B) Mg(HCO3)₂

(C) CA(HCO3)2

(D) All of these

✅ Correct Answer: MgSO4

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Source: This question is taken from the Everyday Science

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Permanent hardness of water may be removed by the addition of___________...?

(A) Sodium Carbonate

(B) Alum

(C) Potassium Permanganate

(D) Lime

✅ Correct Answer: Sodium Carbonate

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Source: This question is taken from the Everyday Science

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Permanent hardness of water is due to the presence of __________...?

(A) Sodium bicarbonate

(B) Calcium sulfate

(C) Calcium bicarbonate

(D) None of these

✅ Correct Answer: Calcium sulfate

Comments

Source: This question is taken from the Everyday Science

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Permanent hardness of water due to sulphate of metals can be destroyed by the use of ________ ...?

(A) Zeolites

(B) Sulphonides

(C) Lime

(D) Nitrates

✅ Correct Answer: Zeolites

Comments

Source: This question is taken from the Everyday Science

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Permanent hardness of water can be removed by adding __________...?

(A) Chlorine

(B) Washing soda

(C) Bleaching powder

(D) None of these

✅ Correct Answer: Washing soda

Comments

Source: This question is taken from the Everyday Science

The permanent hardness of water is due to presence ______...? Mcqs

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