KCET · Chemistry · Hydrogen
Which of the following ions will cause hardness in water?
- A \( \mathrm{Ca}^{2+} \)
- B \( \mathrm{Na}^{+} \)
- C \( \mathrm{Cl}^{-} \)
- D \( \mathrm{K}^{+} \)
Answer & Solution
Correct Answer
(A) \( \mathrm{Ca}^{2+} \)
Step-by-step Solution
Detailed explanation
Presence of calcium and magnesium salts of hydrogen carbonates, chlorides and sulphates makes water Hard
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