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Question

The substance used for regenerating the exhausted permutit is :

A
100V H2O2
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B
dil. HCl
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C
10% NaCl solution
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D
10% Na2CO3 Solution
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Solution

The correct option is C 10% NaCl solution
The substance used for regenerating the exhausted permutit (CaAl2Si2O8.xH2O) is 10%NaCl solution which retains the formula of original permutit (Na2Al2Si2O8.xH2O).

Hence, option C is correct.

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