Identify the term in the following : The method used to separate ore from gangue by preferential wetting
Write the equation for the reaction where the -
aluminum oxide for the electrolytic extraxtion of aluminum is obtained by heating aluminum hydroxide.

Write the equation for the reaction when aluminium oxide for the electrolytic extraction of aluminium is obtained by heating aluminium hydroxide.

Identify the term/substance of the following: The method used to separate ore from gangue by preferential wetting.

(i)Name the solution used to react with Bauxite as a first step in obtaining pure aluminium oxide, in the Baeyer's process. (ii) Write the equation for the reaction where the aluminum oxide for the electrolytic extraction of aluminum is obtained by heating aluminium hydroxide.

Answer the following question related with the isolation of aluminium from bauxite: The aluminium oxide for the electrolytic extraction of aluminium is obtained by heating aluminium hydroxide. Write the equation for this reaction.

The following is an extract from 'Metals in the Service of Man, Alexander and Street/Pelican 1976. 'Alumina (aluminium oxide) has a very high melting point of over 2000^@ C so that it cannot readily be liquefied. However, conversion of alumina to aluminium and oxygen, by electrolysis, can occur when it is dissolved in some other substance : The aluminium oxide for the electrolytic extraction of aluminium is obtained by heating aluminium hydroxide. Write the equation for this reaction.

Which of the following methods is used for obtaining aluminum metal ?

Aluminium is extracted from bauxite by the electrolysis of aluminium oxide dissolved in cryolite. Now answer the following question: Write the equation for the action of heat on aluminium hydroxide.

Write balanced chemical equations for the following reactions : (i) When copper is heated in air. (ii) When aluminium is heated in air. (iii) Aluminium oxide reacts with Sodium hydroxide.

(i) Name the most common ore of the metal aluminum from which the metal is extracted. Write the chemical formula of the ore. (ii) Name the process by which impure ore of aluminum gets purified by using concentrated solution of an alkali. (iii) Write the equation for the formation of aluminum at the cathode during the electrolysis of alumina.

Choosing the substances from the list given below, write balanced chemical equations for the reactions which would be used in the laboratory to obtain the following salts: Sodium sulphate