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Which of the following compounds is used for removing permanent hardness of water?
- (a)Bleaching powder
- (b)Washing soda
- (c)Baking soda
- (d)Caustic soda
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(B) / Washing soda (1 Mark)
Which of the following compounds is used for removing permanent hardness of water?
CBSE Class 10 Science PYQ · Acids, Bases and Salts · Washing soda and water of crystallisation · 1 Mark · March 2026 · Standard
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