Advertisements
Advertisements
प्रश्न
Draw a well-labelled diagram of extraction of Aluminium. Write the anode reaction in electrolytic reduction of Alumina.
Advertisements
उत्तर
At anode: \[\ce{2O^{2-} -> O2 + 4e-}\]
APPEARS IN
संबंधित प्रश्न
Which of the following pairs will give displacement reactions?
Name one metal which is extracted by reduction with carbon.
Name one metal which is extracted by reduction with heat alone.
Name two metals which occur in nature in free state as well as in combined state.
Name one ore of sodium. Name the sodium compound present in this ore and write its chemical formula.
Which metal is extracted from bauxite ore?
Describe the extraction of zinc metal from its sulphide ore (zinc blende). Write equations of the reactions involved.
How is copper extracted from its sulphide ore (copper glance), Cu2S? Explain with equations of the reactions involved.
The metal which is always present in an amalgam is:
(a) iron
(b) aluminium
(c) mercury
(d) magnesium
During galvanisation, iron metal is given a thin coating of one of the following metals. This metal is:
(a) chromium
(b) tin
(c) zinc
(d) copper
Calamine ore can be converted into zinc oxide by the process of:
(a) dehydration
(b) roasting
(c) calcination
(d) sulphonation
A black metal oxide XO2 is used as a catalyst in the preparation of oxygen gas from potassium chlorate. The oxide XO2 is also used in ordinary dry cells. The metal oxide XO2 cannot be reduced satisfactorily with carbon to form metal X.
(a) Name the metal X.
(b) Name the metal oxide XO2.
(c) Which reducing agent can be used to reduce XO2 to obtain metal X?
(d) Name another metal which can also be extracted by the reduction of its oxide with the above reducing agent.
Arrange the metals of copper, iron, magnesium, sodium and zinc in the decreasing order of reactivity.
Heating an ore in a limited supply of air or in the absence of air at a temperature just below its melting point is known as ______.
Name the methods by which concentrated ore is converted to metallic oxide.
Define calcination.
Atomic number of aluminium is _______ and its electronic configuration is _______.
Find the odd one out and give its explanation.
Explain the difference between Bayer’s process and Hall’s process by explaining the Bayer’s process.
Which of the following ore is concentrated by the Froth floatation process?
