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प्रश्न
State how would you prepare copper (II) oxide from
copper sulphate
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उत्तर
Preparation from Copper Sulphate :
\[\ce{CuSO4 + H2O -> CuO + H2SO4}\]
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संबंधित प्रश्न
Write a balanced chemical equation for the preparation of the following salts
Copper carbonate
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.
How many salts can be obtained from ortho phosphoric acid? Is there any difference in the salts formed by the acid?
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
MgCO3 from MgCl2
Write the balanced equation for the preparation of the following compounds, starting from iron and other substance:
Iron (II) sulphide
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
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
Mention the colour changes observed when the following indicators are added:
| Solution | Acids | Alkalies |
| (a) Alkaline phenolphthalein solution | ||
| (b) Methyl orange solution | ||
| (c) Neutral litmus solution |
