A red colouration or precipitate is not obtained when:A. `Fe^(3+)` reacts with potassium thiocyanateB. `Fe^(2+)` reacts with dimethylglyoxime.C. `Hg^(2+)` reacts with potassium iodide.D. None

A red colouration or precipitate is not obtained when:A. `Fe^(3+)` rea

1.	A red colouration or precipitate is not obtained when:A. `Fe^(3+)` reacts with potassium thiocyanateB. `Fe^(2+)` reacts with dimethylglyoxime.C. `Hg^(2+)` reacts with potassium iodide.D. None
Answer» Correct Answer - D (A)`Fe^(3+)+3SCN^(-)toFe(SCN)_(3)`(red solution) (B)Red solution of iron `(II)` dimethylglyoxime. (C )`Hg^(2-)+2l^(-)toHgl_(2) darr` (red).

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When a metal rod M is dipped into an aqueous colourless concentrated solution of compound N, the solution turns light blue. Addition of aqueous `NaCl` to the blue solution gives a white precipitate O. Addition of aqueous `NH_(3)` dissolves O and gives an intense blue solution. The final solution containsA. `[Pb(NH_(3))_(4)]^(2+)` and `[CoCl_(4)]^(2-)`B. `[Al(NH_(3))_(4)]^(3+)]` and `[Cu(NH_(3))_(4)]^(2+)`C. `[Ag(NH_(3))_(2)]^(+)` and `[Cu(NH_(3))_(4)]^(2+)`D. `[Ag(NH_(3))_(2)]^(+)` and `[Ni(NH_(3))_(6)]^(2+)`
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To a metal nitrate, when KI solution is added, a black precipitate is produced at first , on additing excess of KI, orange solution is produced. Identify the meatl ionA. `Hg^(2+)`B. `Bi^(3+)`C. `Cu^(2+)`D. `Pb^(2+)`
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A red colouration or precipitate is not obtained when:A. `Fe^(3+)` reacts with potassium thiocyanateB. `Fe^(2+)` reacts with dimethylglyoxime.C. `Hg^(2+)` reacts with potassium iodide.D. None

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