Advertisements
Advertisements
प्रश्न
The following question relate to the extraction of aluminium by electrolysis.
Give the equation for the reaction which takes place at the cathode.
उत्तर
Reaction at cathode :
Al3+ + 3e- → Al
APPEARS IN
संबंधित प्रश्न
Which metal becomes black in the presence of hydrogen sulphide gas in air?
Name the gas in air which tarnishes silver articles slowly.
Which one of the methods given in column I is applied for the extraction of each of the metals given in column II:
Column I | Column II |
Electrolytic reduction | Aluminium |
Reduction with Carbon | Zinc |
Reduction with Aluminium | Sodium |
Iron | |
Manganese | |
Tin |
Which gas is produced during the extraction of aluminium? At which electrode is this gas produced?
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
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.
Give reasons, why aluminum is used in:
In aluminiothermy
Mercury, silver, gold are highly reactive metals.
Identify who I am!
Ore of Aluminum- ______
Explain the following reaction with the balanced equation.
Ferric oxide is reacted with aluminium.