1.

Which of the following represents calgo?

Answer»

`Na_(2)AI_(2)Si_(2)O_(8)`
`Mg_(3)(PO_(4))_(2)`
`Na_(2)[Na_(4)(PO_(3))_(6)]`
`Na_(2)[Mg_(2)(PO_(3))_(6)]`

Solution :The complex salt of metaphosphoric acid, SODIUM hexametaphosphate `(NaPO_(3))_(6)` is known as calgon. It is represented as `Na_(2)[Na_(4)(PO_(3))_(6)]`.


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