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प्रश्न
Aluminium oxide is _______ oxide.
पर्याय
acidic
basic
neutral
amphoteric
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उत्तर
Aluminium oxide is amphoteric oxide.
APPEARS IN
संबंधित प्रश्न
In the extraction of aluminium: Name the process of concentration of bauxite.
Describe with one example, how moderately reactive metals (which are in the middle of reactivity series) are extracted.
A sulphide ore is converted into metal oxide by the process of ______.
The metal which can be extracted from pyrolusite ore is ______.
Which metal can be extracted from the following ore?
Calamine
Give reasons, why aluminum is used in:
In making ships
Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process :
Name the electrode, from which aluminium collected.
Define the term:
Slag
Complete the incomplete statement with missing word:
Metals form positive ions while non- metals ______.
X is an element in the form of a powder. X burns in oxygen and the product is soluble in water. The solution is tested with litmus. Write down only the word which will correctly complete each of the following sentences:
(a) If X is a metal, then the litmus will turn ______.
(b) If X is a non-metal, then the litmus will turn ______.
(c) If X is a reactive metal, then ______ will be evolved, when X reacts with dilute sulphuric acid.
(d) If X is a non -metal, it will form _ oxide, which will form ______ solution with water.
(e) If X is a non -metal, it will not conduct electricity unless it is carbon in the form of ______.
Which one of the following is not true of metal :
Metals are good conductors of electricity.
Which one of the following is not true of metal :
Metal will have 1 or 2 or 3 electrons in their valence shell.
Name the following :
The Process of heating an ore to a high temperature in the presence of air.
In Electrolytic reduction of alumina, Anode : _______ : : Cathode : Graphite lining
Find the odd one out and give its explanation.
Write the molecular formulae of the following compound.
Fluorspar
Observe the following diagram and write answers.
- Name the method.
- Write anode reaction and cathode reaction.
- Why fluorspar and cryolite are added in the mixture?
Explain Bayer’s process of concentration of bauxite with a chemical equation.
Explain the difference between Bayer’s process and Hall’s process by explaining the Bayer’s process.
In extraction of copper, the flux used is ____________.
