Advertisements
Advertisements
Question
Draw a well-labelled diagram of extraction of Aluminium. Write the anode reaction in electrolytic reduction of Alumina.
Advertisements
Solution

At anode: \[\ce{2O^{2-} -> O2 + 4e-}\]
APPEARS IN
RELATED QUESTIONS
Metallic oxides of zinc, magnesium and copper were heated with the following metals.
| Metal | Zinc | Magnesium | Copper |
| Zinc oxide | – | – | – |
| Magnesium oxide | – | – | – |
| Copper oxide | – | – | – |
In which cases will you find displacement reactions taking place?
A zinc ore gave CO2 on treatment with a dilute acid. Identify the ore and write its chemical formula.
Which metal becomes black in the presence of hydrogen sulphide gas in air?
Describe the extraction of zinc metal from its sulphide ore (zinc blende). Write equations of the reactions involved.
Which of the following reactants are used to carry out the thermite reaction required for welding the broken railway tracks?
Which of the following metals are extracted by the electrolysis of their molten chlorides?
State why aluminium is extracted from its oxide by electrolysis while copper, lead, iron by reducing agents and mercury and silver by thermal decomposition.
Give reasons, why aluminum is used in:
making alloys
Aluminum is used in thermite welding:
write reaction for process?
Define the term:
Slag
How many valence electrons are present in non- metals?
Compare the properties of a typical metal and a non- metal on the basis of the following:
(a) electronic configuration
(b) nature of oxides
(c) oxidizing or reducing action
(d) conductivity of heat and electricity
Define roasting.
Iron is _______.
In the electrolytic method, a layer of highly active metal is applied to a less active metal.
Explain the reactions of nonmetals with water with the help of examples.
Explain the following reaction with the balanced equation.
Ferric oxide is reacted with aluminium.
Explain concept with example/explain with the help of a balanced equation.
Ionic bond and ionic compounds
Electrical wires have a coating of an insulting material. The material, generally used is
Two ores A and B were taken. On heating ore A gives CO2 whereas, ore B gives SO2. What steps will you take to convert them into metals?
