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प्रश्न
Choose the correct answer from the options given below :
Sodium zincate (Na2ZnO2) is
पर्याय
Pale blue ppt
Reddish brown ppt
Colourless
Dirty green ppt
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उत्तर
Sodium zincate (Na2ZnO2) is Colourless
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संबंधित प्रश्न
State your observations when barium chloride solution is mixed with sodium sulphate solution.
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 |
You are given three white powders-calcium carbonate, lead carbonate and zinc carbonate. Describe the tests you would carry out in solution, to identify the metal ion in each of the above compounds. Indicate clearly how you would prepare the solutions for the tests.
How will the action of dilute hydrochloric acid on sodium carbonate and sodium sulphite enables you to distinguish between these two compounds?
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 |
State the colour of the residue formed when nitrate of calcium is strongly heated.
Write balanced equation for a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.
Give the balanced equations for the reaction with two different amphoteric oxides with a caustic alkali.
Name the products formed when the reaction with two different amphoteric oxides with a caustic alkali.
An amphoteric oxide.
