1.

The reagents, NH_4 Cl and aqueous NH_3 will precipitate

Answer»

`Ca^(2+)`
`AL^(3+)`
`Bi^(3+)`
`MG^(2+)`

Solution :`Al^(3+)` is a group III basic radical and `Bi^(3+)` is a group II basic radical . Both of these radicals GET precipitated as their hydroxides i.e, `Al (OH)_(3)` and `Bi(OH)_(3)` respectively with `NH_4Cl + NH_(4) OH ` (or aq. `NH_(3)`) in their respective GROUPS.


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