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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 would you obtain salt from another salt?
The following is a list of methods for the preparation of salts.
A – direct combination of two elements
B – reaction of a dilute acid with a metal.
C – reaction of a dilute acid with an insoluble base.
D – titration of a dilute acid with a solution of soluble base.
E – reaction of two solutions of salts to form a precipitate.
Choose from the above list A to E, the best method of preparing the following salt by giving a suitable equation in the following case:
Anhydrous ferric chloride.
State how would you prepare copper (II) oxide from
Copper nitrate
Give equation to prepare the following as directed
NaHCO3 from Na2CO3
Define the following term:
Neutralisation
Choosing only substances from the list given in the box below, write equations for the reactions which you would use in the laboratory to obtain:
(i) Sodium sulphate
(ii) Copper sulphate
(iii) Iron (II) sulphate
(iv) Zinc carbonate
| Dilute sulphuric acid |
Copper, Iron, |
Copper carbonate, Sodium carbonate |
Write the balanced equation for the preparation of the following compounds, starting from iron and using other substance: Iron (II) chloride
Write the equations for the reaction to prepare lead sulphate from lead carbonate.
Give the equation for the preparation of the following salt from the starting material given.
Iron (III) Chloride from Iron
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 zincate.
