1.

The reagent, NH_(4)Cl and aqueous NH_(3) will precipitate

Answer»

`CA^(2+)`
`Al^(3+)`
`Bi^(3+)`
`Mg^(2+)`

Solution :`Al^(3+)` (THRID group RADICAL) and `Ca^(2+)` (fifth grou radical) precipitate out as their hydroxide with `NH_(4)Cl` and aq. `NH_(3)(NH_(4)OH)` which are the group reagents.


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