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Science · 2026 · 1 mark
CBSE 2026 · Region 2 · Set 3 · Q18
Which of the following compounds is used for removing permanent hardness of water?
Which of the following compounds is used for removing permanent hardness of water?
Official answer
(B)
Washing soda
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CBSE Class 10 Science past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.