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Extraction of Aluminium

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Question

Select the correct answer from the choice in a bracket to complete each sentence.
_________ $[K C l O_{2} / K C l O_{3}]$ gives potassium chloride and oxygen on heating with manganese dioxide.

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Solution

Potassium chlorate $(K C l O_{3})$ gives potassium chloride and oxygen when heated in the presence of manganese dioxide catalyst.
$2 K C l O_{3} M n O_{2} - --- \to 2 K C l + 3 O_{2}$

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