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प्रश्न
Explain the following method with example.
Direct combination
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उत्तर
Direct combination i.e. by heating two elements together
\[\ce{Metal + Non metal -> Salt}\]
\[\ce{2Na(molten) + Cl2 -> 2NaCl}\]
\[\ce{2Fe + 3Cl2 -> 2FeCl3}\]
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संबंधित प्रश्न
How is the following salt prepared:
Lead carbonate from lead nitrate.
Describe giving all practical details, how would you prepare:
lead sulphate from metallic lead.
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 |
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 iron (III) chloride.
Choose the method of preparation of the following salts, from the methods given in the list:
[List : A. Neutralization B. Precipitation C. Direct combination D. Substitution ]
(i) Lead chloride
(ii) Iron (II) sulphate
(iii) Sodium nitrate
(iv) Iron (III) chloride
Define the following term:
Neutralisation
Write the balanced equation for the preparation of the following compounds, starting from iron and other substance:
Iron (II) sulphide
The diagram given below is to prepare iron (III) chloride in the laboratory.
(i) What is substance B?
(ii) What is the purpose of B?
(iii)Why is iron (III) chloride to be stored in a closed container?
(iv) Write the equation for the reaction between iron and chloride ?
Give the equation for the preparation of the following salt from the starting material given.
Potassium sulphate from potassium hydroxide solution
For each of the salt: A, B, C and D, suggest a suitable method of its preparation.
- A is a sodium salt.
- B is an insoluble salt.
- C is a soluble salt of copper.
- D is a soluble salt of zinc.
