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(i) Name the most common ore of the meta...

(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.

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Name the process by which impure ore of aluminium gets purified by using concentrated solution of an alkali.

Name the process by while the impure ore of aluminium gets purified by using a conc. Soln. of an alkali.

Write a balanced chemical equation for - (i) The formation of aluminium at the cathode, during the electrolysis of alumina. (ii) Action of heat on aluminium hydroxide.

In the extraction of aluminium from bauxite the first step is the dressing of the ore by Baeyer's process. Give balanced equations for the conversion of impure bauxite to pure alumina using a concentrated solution of NaOH .

Name the metals which are extracted from pyrolusite ores:

The ore from which aluminium is extracted must first be treated with solution so that pure aluminium oxide can be obtained. Name the ore and solution

(i) Write structural formula of the compound formed when one mole of ethyne reacts with one mole of hydrogen gas. (ii)Name the catalyst used in the above reaction. (iii) Write temperature at which the reaction mentioned in (a) occurs. (iv) Name the reaction.

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(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.

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