Which of the following is helpful for removal of permanent hardness...? Mcqs

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💡 English word par Double-Click karein: Urdu meaning + pronunciation 🔊

Which of the following is helpful for removal of permanent hardness...?

(A) Na2CO3

(B) Ca(OH)2

(C) CaCO2

(D) Na2SO4

✅ Correct Answer: Na2CO3

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Source: This question is taken from the Everyday Science

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