InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
A coloured solution known to contain two metal ions of different groups, was treated with excess cold sodium hydroxide solution. When filtered a whitish solid, slowly changing to brown, was retained on the filter paper and a colourless solution collected as the filtrate. Drop wise adition of hydrochloric acid to the filtrate produced a white precipitate which dissolved in excess acid. Treatment of the residue from the filter paper with a strong oxidiser, `PbO_(2)` and concentrated `HNO_(3)` on boiling produced a reddish-violet (purple) solution. Indicate any pairs of ions which on testing as above leads to the observed changes.A. `AI^(3+)` and `Mn^(2+)` ionsB. `Mg^(2+)` and `Zn^(2+)` ionsC. `Mn^(2+)` and `Mg^(2+)` ionsD. `Zn^(2+)` and `Mn^(2+)` ions |
| Answer» Correct Answer - A | |