A) \[{{H}^{+}}\]ions
B) \[C{{a}^{2+}}\]ions
C) \[M{{g}^{2+}}\]ions
D) Both \[C{{a}^{2+}}\] and \[M{{g}^{2+}}\]
Correct Answer: D
Solution :
Zeolite when treated with hard water exchange \[C{{u}^{+2}}\] and \[M{{g}^{+2}}\] ions (present in hard water) with \[N{{a}^{+}}\] ions.
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