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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: \[\ce{Zn(OH)2 + 2NaOH -> \underset{(excess)}{Na2ZnO2} + \underset{(colourless)}{\underset{Soluble}{2H2O}}}\]
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: CuO from ZnO
Choose the correct answer from the options given below :
Color of ferrous ion is
You are given a mixture of precipitated copper hydroxide and zinc hydroxide. Name a solvent which will dissolve:
Only copper hydroxide
You are given a mixture of precipitated copper hydroxide and zinc hydroxide. Name a solvent which will dissolve:
Only zinc hydroxide
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.
Write a balanced equation for the following conversion:
\[\ce{CuSO4 ->[A]Cu(OH)2 ->[B] [Cu(NH3)4]SO4}\]
The hydroxide soluble in excess of ammonium hydroxide is ______.
An amphoteric oxide.
