हिंदी

Aluminium oxide is _______ oxide . - Science and Technology 1

Advertisements
Advertisements

प्रश्न

Aluminium oxide is _______ oxide.

विकल्प

  • acidic

  • basic

  • neutral

  • amphoteric

MCQ
रिक्त स्थान भरें
Advertisements

उत्तर

Aluminium oxide is amphoteric oxide.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 8: Metallugy - Choose the correct option.

संबंधित प्रश्न

Name one metal which is extracted by reduction with heat alone.


 How is zinc extracted from its carbonate or (calamine)? Explain with equations.


Define the terms gangue.


Which metal is extracted from calamine ore?


The metal which can be extracted simply by heating the cinnabar ore in air is:
(a) Zn
(b) Cu
(c) Al
(d) Hg


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.


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:

what is thermit?


Give the chemical formula of :
 Cryolite 


How are metals refined by the electrolytic methods?


Name the following:

A compound which is added to lower the fusion temperature of the electrolytic bath in the extraction of aluminium.


Correct the following statement :
Copper reacts with nitric acid to produce nitrogen dioxide.


Answer the following question :
What is the difference between calcination and roasting.


If Cu, Fe, Zn, Al elements are arranged in increasing order of their reactivity then the correct order would be which of the following?


In Electrolytic reduction of alumina, Anode : _______ : : Cathode : Graphite lining


Complete flow chart given below.


Explain Bayer’s process of concentration of bauxite with a chemical equation.


The poorest conductor of heat among metals is ____________.


The given reaction shows one of the processes to extract the metals like Iron and Manganese.

\[\ce{MnO2(s) + Al(s) -> Mn(l) + Al2O3(s) + Heat}\]

Give a reason why Aluminium is preferably used in thermite reactions.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×