Advertisements
Advertisements
Question
How is the following metallic oxide reduced? Write equations:
Iron (ll) oxide
Advertisements
Solution
Iron is a moderately reactive metal; its oxide is reduced by Carbon Reduction Process.
\[\ce{FeO + CO ->[750-500^\circ C] Fe + CO2}\]
\[\ce{4FeO + O2 -> 2Fe2O3}\]
\[\ce{Fe2O3 + 3CO ->[600^\circ C-400^\circ C]2Fe + 3CO2}\]
APPEARS IN
RELATED QUESTIONS
An element L consists of molecules.
When L is heated with iron metal, it forms a compound FeL. What chemical term would you use to describe the change undergone by L?
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 lead (II) oxide by carbon.
If fused metallic chloride is electrolyzed, at which electrode would the metal be obtained?
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.
(a) When bauxite is treated with sodium hydroxide solution, what happens to:
(i) the aluminium oxide?
(ii) The iron (III) oxide?
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 with respect by hydrogen : Identify the components of the electrolyte other than pure alumina and the role played by each.
Write the observation for the following:
A paper dipped in potassium permanganate solution is put on the mouth of a test tube containing sulphur dioxide gas.
- A to F below relate to the source and extraction of either zinc or aluminium:
- Bauxite
- Coke
- Cryolite
- Froth floatation
- Sodium hydroxide solution
- Zinc blende
- Write down the three letters each from the above list which are relevant to
- Zinc
- Aluminium
- Fill in the blanks using the most appropriate words from A to F.
- The ore from which aluminium is extracted must first be treated with ………………. so that pure aluminium oxide can be obtained.
- Pure aluminium oxide is dissolved in ….. to make a conducting solution.
iii. Write the formula of cryolite.
