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प्रश्न
Write a balanced equation for the following conversion:
\[\ce{CuSO4 ->[A]Cu(OH)2 ->[B] [Cu(NH3)4]SO4}\]
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उत्तर
\[\ce{\underset{Blue}{CuSO4} + 2NH4OH -> \underset{NH4OH ppt.dissolves}{\underset{Pale blue ppt. with excess}{Cu(OH)2\downarrow}} + (NH4)2SO4}\]
\[\ce{Cu(OH)2 + (NH4)2SO4 + 2NH4OH -> \underset{Tetraammine copper (II) sulphate}{\underset{deep blue solution}{[Cu(NH3)4]SO4}} + 4H2O}\]
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संबंधित प्रश्न
_____________ (AgCl / PbCl2), a white precipitate is soluble in excess NH4OH
Match the salts given in Column I with their method of preparation given in Column II.
| Column I | Column II | ||
| 1 | Pb(NO3)2 from PbO | A | Simple displacement |
| 2 | MgCl2 from Mg | B | Titration |
| 3 | FeCl3 from Fe | C | Neutralization |
| 4 | NaNO3 from NaOH | D | Precipitation |
| 5 | ZnCO3 from ZnSO4 | E | Combination |
Name a solution that will separate the component of the following mixture: CuO from ZnO
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Sodium hydroxide solution is added first in a small quantity, then in excess to the aqueous salt solutions of copper (II) sulphate, zinc nitrate, lead nitrate, calcium chloride and iron (III) sulphate. Copy the following table and write the colour of the precipitate in (i) to (v) and the nature of the precipiatate (soluble or insoluble) in (vi) to (x)
| Aqueous salt Solution | Colour of Participitate when NaOH is added in a samll quantity | Nature of precipitate(soluble or insoluble) when NaOH added in excess |
| Copper (II) Solution | ||
| Zinc nitrate | ||
| Lead nitrate | ||
| Calcium chloride | ||
| Iron(III) sulphate |
Give one chemical test to distinguish between the following pair of compounds:
Zinc sulphate solution and Zinc chloride solution
Write balanced equation for a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.
A given white crystalline salt was tested as follows:
The addition of barium chloride solution into this solution gave a white precipitate. What conclusions can be drawn for the observation?
The questions (i) to (v) refer to the following salt solutions listed A to F.
A.Copper Nitrate
B.Iron (II) Sulphate
C.Iron (III) chloride
D.Lead Nitrate
E.Magnesium sulphate
F.Zinc chloride
(I)Which two solutions will give a white precipitate when treated with dilute hydrochloric acid followed by a barium chloride solution?
(II)Which two solutions will give a white precipitate when treated with dilute nitric acid followed by silver nitrate solution?
(III)Which solution will give white precipitate, when either dilute hydrochloric acid or dilute sulphuric acid is added to it?
(IV)Which solution becomes a deep/inky blue colour when the excess of ammonium hydroxide is added to it?
(V)Which solution gives a white precipitate with an excess of ammonium hydroxide solution?
Write balanced equation for a metal that evolves a gas which burns with a pop sound when boiled with alkali solutions.
