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प्रश्न
Distinguish between the given pair of compounds using the test given within bracket:
A lead salt and a zinc salt (using excess ammonium hydroxide)
Distinguish between the following pair of compounds using the test given within bracket.
A lead salt and a zinc salt (using excess ammonium hydroxide)
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उत्तर
| Lead salt | Zinc salt | |
| 1. | On adding ammonium hydroxide, a white precipitate of lead hydroxide, Pb(OH)2, is formed. | On adding ammonium hydroxide, a white gelatinous precipitate of zinc hydroxide, Zn(OH)2, is formed. |
| 2. | The precipitate does not dissolve in excess ammonium hydroxide. | The precipitate dissolves in excess ammonium hydroxide, forming a clear solution. |
Hence, lead salt remains insoluble, while zinc salt dissolves in excess ammonium hydroxide.
संबंधित प्रश्न
How is the following salt prepared:
Lead carbonate from lead nitrate.
Give the preparation of the salt shown in the left column by matching with the methods given in the right column. Write a balanced equation for each preparation.
| Salt | Method of preparation |
| Zinc Sulphate | Precipitation |
| Ferrous sulphide | Oxidation |
| Barium Sulphate | Displacement |
| Ferric sulphate | Neutralisation |
| Sodium sulphate | Synthesis |
Explain why It is necessary to find out the ration of reactants required in the preparation of sodium sulphate.
How many salts can be obtained from ortho phosphoric acid? Is there any difference in the salts formed by the acid?
State how would you prepare copper (II) oxide from
copper sulphate
Choosing the correct words given in brackets, complete the sentence given below: Copper sulphate from copper.
Give the equation for the preparation of the following salt from the starting material given.
Lead chloride from lead carbonate (two equations)
Name the method used for preparation of the following salts from the list given below:
(i) Sodium nitrate
(ii) Iron (III) chloride
(iii) Lead chloride
(iv) Zinc sulphate
(v) Sodium hydrogen sulphate
List :
(a) Simple displacement
(b) Neutralization
(c) Decomposition by acid
(d) Double decomposition
(e) Direct synthesis
Choose the most appropriate answer from
(SO2, SiO2, Al2O3, CO, MgO, Na2O)
A covalent oxide of a metalloid.
Choose the most appropriate answer from
(SO2, SiO2, Al2O3, CO, MgO, Na2O)
An oxide which when dissolved in water form acid.
