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प्रश्न
Which water is hard?
एका वाक्यात उत्तर
उत्तर
Tap and well water are considered as hard due to the presence of a large number of minerals and salts.
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Classification of water: Soft and Hard Water
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
