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प्रश्न
Give one chemical test to distinguish between the following pair of compounds:
Iron (II) chloride solution and iron (III) chloride solution
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उत्तर
| Iron (II) chloride | Iron (III) chloride |
|
Add sodium hydroxide to the above solution; a dirty green ppt. is formed. \[\ce{FeCl2 + 2NaOH -> 2NaCl + Fe(OH)2\downarrow}\] |
Add sodium hydroxide to the above solution; a reddish-brown ppt. is observed. \[\ce{FeCl3 + 3NaCl -> 3NaCl + Fe(OH)3\downarrow}\] |
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संबंधित प्रश्न
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 |
State your observation When excess sodium hydroxide is added to calcium nitrate solution
Name a solution that will separate the component of the following mixture: CaO from PbO
Choose the correct answer from the options given below :
Sodium zincate (Na2ZnO2) is
Give the balanced equations for the reaction with two different amphoteric oxides with a caustic alkali.
Write a balanced equation for the following conversion:
\[\ce{ZnSO4 ->[A]Zn(OH)2->[B]Na2ZnO2}\]
When an ammonium hydroxide solution is added to solution B, a pale blue precipitate is formed. This pale blue precipitate dissolves in excess ammonium hydroxide giving an inky blue solution. What is the cation present in solution B?
When an ammonium salt is warmed with sodium hydroxide solution, a gas is evolved. State three ways in which you could identify this gas.
Write a balanced equation of a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.
An amphoteric oxide.
