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प्रश्न
Write a balanced equation for the following conversion:
\[\ce{ZnSO4 ->[A]Zn(OH)2->[B]Na2ZnO2}\]
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उत्तर
A: \[\ce{\underset{(white gelatinous)}{ZnSO4} + 2NaOH -> Zn(OH)2\downarrow + Na2SO4}\]
In excess Na2ZnO2 dissolves in NaOH
B: \[\ce{Zn(OH)2 + 2NaOH -> \underset{(excess)}{Na2ZnO2} + \underset{(colourless)}{\underset{Soluble}{2H2O}}}\]
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संबंधित प्रश्न
State your observations when barium chloride solution is mixed with sodium sulphate solution.
Name a solution that will separate the component of the following mixture: Zn(OH)2 from Pb(OH)2
Choose the correct answer from the options given below :
Color of ferrous ion is
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:
Iron (II) chloride solution and iron (III) chloride solution
Name the products formed when the reaction with two different amphoteric oxides with a caustic alkali.
Write a balanced equation for the following conversion:
\[\ce{CuSO4 ->[A]Cu(OH)2 ->[B] [Cu(NH3)4]SO4}\]
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?
Write a balanced equation of a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.
An amphoteric oxide.
