MEDIUMMCQ SINGLENEET ChemistryInorganic Chemistryp-Block (group 13 and 14)Aluminium and Its Compounds

Heating an aqueous solution of aluminium chloride to dryness will give

A.AlCl3

B.Al2Cl6

C.Al2O3✓ Correct

D.Al(OH)Cl2

Explanation

Due to the heating of 3 AlCl (aq) solution, at first 3 Al(OH) is formed. Then further heating of 3 Al(OH) up to dryness, white 2 3 Al O is formed. The reactions are shown below, 3 2 3 3 2 3 2 2AlCl 6H O 2Al OH 6H H ( ) Cl 2Al OH Al O 3 O ( ) + ® + ® +

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