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प्रश्न
What is the difference between the chemical nature of an aqueous solution of HCl and an aqueous solution of NH3
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उत्तर १
The chemical nature of an aqueous solution of HCl and an aqueous solution of NH3
1. The aqueous solution of HCl is acidic in nature. It can turn blue litmus to red.
2. The aqueous solution of NH3 is basic in nature. It can turn red litmus to blue.
उत्तर २
In its pure liquid state, HCl is unionised and does not conduct electricity. However, in aqueous solution, HCl is a good conductor of electric current, as the H+ ion interacts with water to create [H3O+].
\[\ce{H \phantom{.}^{\bullet}_{\bullet}\overset{\bullet\bullet}{\underset{\bullet\bullet}{Cl}}^{\bullet}_{\bullet}->[H2O][ionisation]H+ + \phantom{.}^{\bullet}_{\bullet}\overset{\bullet\bullet}{\underset{\bullet\bullet}{Cl}}^{\bullet}_{\bullet}}\]
\[\ce{H+ + H2O -> [HO+]}\]
Similarly, In an aqueous solution, NH3 acts as a weak alkali and dissociates partially.
\[\ce{NH4OH <=> [NH4+] +[OH-]}\]
संबंधित प्रश्न
Name the procedure used to prepare a sodium salt such as sodium sulphate.
How is the following salt prepared:
Calcium sulphate from calcium carbonate,
How is the following salt prepared:
Lead carbonate from lead nitrate.
How is the following salt prepared:
Copper (II) sulphate from copper (II) oxide?
Explain why fused calcium chloride is used in the preparation of FeCI3?
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 |
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
Match the salts underlined in Column A with the most suitable method of preparation given in Column B.
| Column A | Column B | ||
| (a) | \[\ce{ZnCl2 \text{from} Zn}\] | 1. | Precipitation |
| (b) | \[\ce{KNO3 \text{from} KOH}\]. | 2. | Direct combination |
| (c) | \[\ce{CaCO3 \text{from} CaCl2}\]. | 3. | Displacement reaction |
| 4. | Neutralization |
You are provided with the following chemicals:
NaOH, Na2CO3, H2O, Zn(OH)2, CO2, HCI, Fe, H2SO4, CI2, Zn.
Using the suitable chemicals from the given list only, state briefly how you would prepare sodium sulphate.
You are provided with the following chemicals:
NaOH, Na2CO3, H2O, Zn(OH)2, CO2, HCI, Fe, H2SO4, CI2, Zn.
Using the suitable chemicals from the given list only, state briefly how you would prepare sodium chloride.
