Advertisements
Advertisements
प्रश्न
Write a balanced chemical equation for each of the following reactions :
(i) Reduction of copper (II) oxide by hydrogen
Advertisements
उत्तर
Balance equation:
CuO + H2 → Cu + H2O
APPEARS IN
संबंधित प्रश्न
Give appropriate scientific reasons for Zinc oxide can be reduced to zinc metal by using
carbon, but aluminium oxide cannot be reduced by a reducing agent
Give reason for the following:
Carbon anodes are used in the electrolytic extraction of aluminium.
Name oxide of one metal which is reduced by (give equation): Reduction with carbon
Name a non-metallic element which has a metallic lustre
With reference to the reduction of copper (II) oxide , iron (II) oxide, lead (II) oxide and magnesium oxide; place the oxides in order of increasing ease of reduction.[i.e. first write the oxide that is most difficult to reduce and at last, the oxide, that is most easily reduced.]
Write balanced equation for the following reaction:
Reduction of iron (III) oxide by carbon monoxide.
If fused metallic chloride is electrolyzed, at which electrode would the metal be obtained?
In order to obtain one tone of aluminium, the following inputs are required:
4 tones of bauxite, 150 Kg of sodium hydroxide and 600 Kg of graphite.
The aluminium compound in bauxite is aluminium oxide and the main impurity is iron (II) oxide. Aluminium is obtained by the electrolysis of aluminium oxide dissolved in cryolite.
(i) Write the formula of cryolite.
(ii) Write down the word which correctly completes the following sentence.
"By dissolving aluminium oxide in cryolite, a ______ (conducting / non- conducting) solution is produced.
(iii) Why so much graphite required for this electrolytic process.
(iv) Write the equation for the reaction which takes place at cathode.
Answer the following question :
Name the process used for the enrichment of sulphide ore.
Give the equation for the reduction of Zinc oxide.
