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Which one of the following can be used ...

Which one of the following can be used in place of `NH_(4)Cl` for identification of the third group radicals?

A

`NH_(4)NO_(3)`

B

`(NH_(4))_(2)SO_(4)`

C

`(NH_(4))_(2)CO_(3)`

D

`NaCl`

Text Solution

Verified by Experts

The correct Answer is:
A
As it provides `NH_(4)^(+)` ions which suppresses the ionisation of `NH_(4)OH` so that only the group `3^(rd)` cations are precipitated as hydroxides because of their low solubility products and `NO_(3)^(-)` ions do not produc precipitate with the cations of `IV^(th),V^(th)` and `VI^(th)` groups.
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