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To avoid the precipitation of hydroxides...

To avoid the precipitation of hydroxides of `Ni^(2+),Co^(2+),Mn^(2+)` along with those of the third group cations, the solutions should be:

A

heated with few drops of concentrated `HNO_(3)`

B

boiled with excess of ammonium chloride

C

concentrated to small volume

D

none of the above

Text Solution

Verified by Experts

The correct Answer is:
B
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GRB PUBLICATION-SALT ANALYSIS-J: IVth Group Cations
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  5. A blue colouration (in solution or precipitate) is not obtained when:

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  6. In the fourth group, white precipitate of Mn(OH)(2) on heating with Pb...

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  11. Among the following, buff colour metal sulphide is:

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  15. Among the following, brownish black colour metal sulphide is:

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  17. To increase significantly the concentration of free Zn^(2+) ion is a s...

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