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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 given in the left column by matching with the methods given in the right column. Write balanced equations for each preparation.
| Salt | Method of Preparation |
| Zinc sulphate | Precipitation |
| Ferrous sulphide | Displacement |
| Barium sulphate | Neutralization |
| Sodium sulphate | Synthesis |
Give equation to prepare the following as directed
NaHCO3 from Na2CO3
Choosing the correct words given in brackets, complete the sentence given below: Copper sulphate from copper.
Which of the following methods, (a), (b), (c), (d) or (e) is generally used for preparing the chlorides listed below from (i) to (v). Answer by writing down the chloride and the letter pertaining to the corresponding method. Each letter is to be used only once.
(a) Action of an acid on a metal.
(b) Action of an acid on an oxide or carbonate.
(c) Direct combination.
(d) Neutralization of an alkali by an acid.
(e) Precipitation (double decomposition).
(i) copper(II) chloride.
(ii) iron(II) chloride.
(iii) iron(IIl) chloride.
(iv) lead (II) chloride.
(v) sodium chloride.
The preparation of lead sulphate from lead carbonate is a two step process (lead sulphate cannot be prepared by adding dilute sulphuric acid to lead carbonate)
What is the first step that is required to prepare lead sulphate from lead carbonate?
Write the equation for the following reaction:
Magnesium sulphate solution is mixed with barium chloride solution.
Give the equation for the preparation of the following salt from the starting material given.
Iron (III) Chloride from Iron
For each of the salt: A, B, C and D, suggest a suitable method of its preparation.
D is a soluble salt of zinc.
Select the word/s given which are required to correctly complete the blanks.
If a piece of magnesium was put into a solution M, ______ gas would be evolved.
