1.

Which among the following reactions is involved for the removal of permanent hardness by anion exchanger resin

Answer»

`Na_(2)AI_(2) SI_(2) O_(8). xH_(2) O + MG^(2+) to` PRODUCT
`Na_(2) [Na_(4)(PO_(3))_(6)] + Mg^(2+) to` product
`R = NH_(3)^(+) OH^(-) + SO_(4)^(2-) to` product
`Na_(2) CO_(3) + Ca^(2_) to` product

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


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