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प्रश्न
Name two metallic oxides which cannot be reduced by carbon, carbon monoxide or hydrogen.
उत्तर
Potassium and sodium oxides cannot be reduced by carbon, carbon monoxide and hydrogen.
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संबंधित प्रश्न
How is the following metallic oxide reduced? Write equations:
Iron (ll) oxide
Name oxide of one metal which is reduced by (give equation): Reduction with heat alone
For the reaction of a metal oxide. Suggest a reducing agent other than carbon
Give the chemical name and formula of 'cryolite'
Write balanced equation for the following reaction:
Reduction of copper oxide by hydrogen.
Write balanced equation for the following reaction:
Reduction of lead (II) oxide by carbon.
If fused metallic chloride is electrolyzed, at which electrode would the metal be obtained?
What metallic property is shown by the non-metal graphite?
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.
