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If matel ions of group II are precipita...

If matel ions of group II are precipitate by `NH_(4)CI` and `NH_(4)OH` without prior oxidation by conconirated `HNO_(3)` _____is not completely precipitate

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`fe^(2+) `ion
If metal ions of group III are precipitate by `NH_(4)CI` and `Nh_(4)OH` without prior oxidation by concentrated `HNO_(3)` ferric ion not completely precipitate .Nitric oxide oxidises ferrous to ferric ions
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