1.

Which among the following reactions is involved for the removal of permanent hardness by anion exchanger resi n:

Answer»

`Na_(2)Al_(2)Si_(2)O_(8).xH_(2)O+MG^(2+)rarr`Product
`Na_(2)[Na_(4)(PO_(3))_(6)]+Mg^(2+)rarr`Product
`R-NH_(3)^(+)OH^(-)+SO_(4)^(2-)rarr` Product
`Na_(2)CO_3+Ca^(2+)rarr` Product

Solution :`underset("Resin")(2RNH_(3)^(+)OH^(-))+SO_(4)^(2-)to(RNH_(3))_(2)SO_(4)+2OH^(-)`


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