Which of the following ions will cause hardness in the water sample?
(i) Ca2+
(ii) Na+
(iii) Cl-
(iv) K+
Which of the following ions will cause hardness in the water sample?
(i) Ca2+
(ii) Na+
(iii) Cl-
(iv) K+
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1 Answer
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This is a multiple choice answer as classified in NCERT Exemplar
Option (i)
Ca2+
Water becomes 'hard' when it contains calcium and magnesium salts in the form of hydrogen carbonate, chloride, and sulphate.
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HF molecules are associated with strong intermolecular hydrogen bonding hence its boiling point is the highest
Compound Melting Point (K)
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HI
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